お世話になっております。
スマートフォン情報の箇所に、下記記載のHTMLを登録したいです。
このまま登録するとPCサイズになってしまうのですが、スマホサイズにするにはどのようにすればよろしいでしょうか？
↓↓↓

<div style="background-color:#ffffff;text-align:center">
<table align="center" width="780" cellpadding="0" cellspacing="0" bgcolor="#ffffff">
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<td align="center" valign="top">
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/open_sale0525b.jpg" alt="open_sale0525b.jpg" width="780" height="360" border="0"><br>
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon_get.jpg" alt="coupon_get.jpg" width="624" height="80" border="0"><br>
<table cellpadding="0" cellspacing="0" width="669" height="237" align="center" bgcolor="#ffffff">
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<td align="center">
<table cellpadding="0" cellspacing="0" width="649">
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<td valign="middle">
<a href="http://coupon.shopping.yahoo.co.jp/interior/emRDN0dPRGpHZVdnJmFpYiYxNDk0OTg3MTc2" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon50_p.jpg" alt="coupon50_p.jpg" width="216" height="216" border="0"></a>
</td>
<td valign="middle">
<a href="http://coupon.shopping.yahoo.co.jp/kaden/NEdxS2E1R0F2WVFZJmFpYiYxNDk0OTg3OTU4" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon20_p.jpg" alt="coupon20_p.jpg" width="216" height="216" border="0"></a>
</td>
<td valign="middle">
<a href="http://coupon.shopping.yahoo.co.jp/kaden/aFdqNG9rTzlXYk03JmFpYiYxNDk0OTg5NTkw" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon10_p.jpg" alt="coupon10_p.jpg" width="217" height="217" border="0"></a>
</td>
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<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon50off.jpg" alt="coupon50off.jpg" width="624" height="80" border="0"><br>
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/space.gif" width="650" height="10"><br>
<a href="http://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/hanger.jpg" alt="hanger.jpg" width="650" height="125" border="0"></a>
<br>
<a href="http://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/sale0514.jpg" alt="sale0514.jpg" width="780" height="541" border="0"></a>
<br>
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/space.gif" width="780" height="50"><br>
<hr color="#666666" width="780" size="2">
<a href="http://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/twin.jpg" alt="twin.jpg" width="650" height="125" border="0"></a>
<br>
<a href="http://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/sale0514.jpg" alt="sale0514.jpg" width="766" height="541" border="0"></a>
<br>
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/space.gif" width="780" height="50"><br>
<hr color="#666666" width="780" size="2">
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon20off.jpg" alt="coupon20off.jpg" width="624" height="80" border="0"><br>
<table cellpadding="0" cellspacing="0" width="580" height="280" align="center" bgcolor="#ffffff">
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<td align="center">
<table cellpadding="0" cellspacing="0" width="560">
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<td valign="middle">
<a href="http://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/sale0515.jpg" alt="sale0515.jpg" width="260" height="260" border="0"></a>
</td>
<td valign="middle">
<a href="http://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/mask.jpg" alt="mask.jpg" width="300" height="250" border="0"></a>
</td>
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</table>
</td>
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</table>
<hr color="#666666" width="780" size="2">
<table cellpadding="0" cellspacing="0" width="580" height="280" align="center" bgcolor="#ffffff">
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<td align="center">
<table cellpadding="0" cellspacing="0" width="560">
<tr>
<td valign="middle">
<a href="https://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/sale0515_1.jpg" alt="sale0515_1.jpg" width="260" height="260" border="0"></a>
</td>
<td valign="middle">
<a href="https://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/serubara.jpg" alt="serubara.jpg" width="300" height="250" border="0"></a>
</td>
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</table>
</td>
</tr>
</table>
<hr color="#666666" width="780" size="2">
<table cellpadding="0" cellspacing="0" width="580" height="280" align="center" bgcolor="#ffffff">
<tr>
<td align="center">
<table cellpadding="0" cellspacing="0" width="560">
<tr>
<td valign="middle">
<a href="https://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/sale0515_2.jpg" alt="sale0515_2.jpg" width="260" height="260" border="0"></a>
</td>
<td valign="middle">
<a href="https://store.shopping.yahoo.co.jp/SHOP-URL/ITEM-URL.html" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/seruesute.jpg" alt="seruesute.jpg" width="300" height="250" border="0"></a>
</td>
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</table>
</td>
</tr>
</table>
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/space.gif" width="780" height="50"><br>
<img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon_get.jpg" alt="coupon_get.jpg" width="624" height="80" border="0"><br>
<table cellpadding="0" cellspacing="0" width="669" height="237" align="center" bgcolor="#ffffff">
<tr>
<td align="center">
<table cellpadding="0" cellspacing="0" width="649">
<tr>
<td valign="middle">
<a href="http://coupon.shopping.yahoo.co.jp/interior/emRDN0dPRGpHZVdnJmFpYiYxNDk0OTg3MTc2" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon50_p.jpg" alt="coupon50_p.jpg" width="216" height="216" border="0"></a>
</td>
<td valign="middle">
<a href="http://coupon.shopping.yahoo.co.jp/kaden/NEdxS2E1R0F2WVFZJmFpYiYxNDk0OTg3OTU4" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon20_p.jpg" alt="coupon20_p.jpg" width="216" height="216" border="0"></a>
</td>
<td valign="middle">
<a href="http://coupon.shopping.yahoo.co.jp/kaden/aFdqNG9rTzlXYk03JmFpYiYxNDk0OTg5NTkw" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/coupon10_p.jpg" alt="coupon10_p.jpg" width="217" height="217" border="0"></a>
</td>
</tr>
</table>
</td>
</tr>
</table>
<a href="https://store.shopping.yahoo.co.jp/SHOP-URL/" target="_self"><img src="https://shopping.c.yimg.jp/lib/SHOP-URL/sale0518.jpg" alt="sale0518.jpg" width="780" height="236" border="0"></a>
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</div>