<html>
<head>
<script type="text/javascript">
n=parseInt(prompt("15"," "));
tabla="<table border='1'>";
for(i=1;i<=20;i++)
{
tabla+="<tr>"+"<td>"+i+"</td>"+"<td>"+"*"+"</td>"+"<td>"+n+"</td>"+"<td>"+"="+"</td>"+"<td>"+(n*i)+"</td>"+"</tr>"
}
tabla+="</table>";
document.write(tabla);
</script>
</head>
</html>
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