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<head>
<meta charset="UTF-8">
<title>计算器-表格版</title>
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<table width="35%" align="center" bgcolor="dimgray" height="90px" cellspacing="0">
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<td>
<font color="red" size=" 6">●</font>
<font color="yellow" size=" 6">●</font>
<font color="blue" size=" 6">●</font>
</td>
</tr>
<tr>
<td height="50px" >
<table border="1"width="99%" height="99%" align="center" bordercolor="red" cellspacing="0">
<tr>
<td bgcolor="white"></td>
</tr>
</table>
</td>
</tr>
</table>
<table width="35%" align="center" bgcolor="dimgray" cellspacing="5" height="450px">
<tr bgcolor="deepskyblue" align="center">
<td width="25%"><font size="6">AC</font></td>
<td width="25%"><font size="6">+/-</font></td>
<td width="25%"><font size="6">%</font></td>
<td><font size="6">÷</font></td>
</tr>
<tr bgcolor="deepskyblue" align="center">
<td><font size=" 6">7</font></td>
<td><font size=" 6">8</font></td>
<td><font size=" 6">9</font></td>
<td><font size=" 6">×</font></td>
</tr>
<tr bgcolor="deepskyblue" align="center">
<td ><font size=" 6">4</font></td>
<td><font size=" 6">5</font></td>
<td><font size=" 6"> 6</font></td>
<td><font size=" 6">-</font></td>
</tr>
<tr bgcolor="deepskyblue" align="center">
<td ><font size=" 6">1</font></td>
<td><font size=" 6">2</font></td>
<td><font size=" 6">3</font></td>
<td><font size=" 6">+</font></td>
</tr>
<tr bgcolor="deepskyblue" align="center">
<td ><font size=" 6">0</font></td>
<td><font size=" 6"><-</font></td>
<td><font size=" 6">.</font></td>
<td><font size=" 6">=</font></td>
</tr>
</table>
</body>
</html>
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