Behind the scenes:

<form name= "frmMultiply" >

<p><input type= "text" name= "T1" size= "20" > X <input type= "text" name= "T2" size= "20" >

<input type= "button" value= " = " name= "B1" onclick= "multiply()" >

<input type= "text" name= "T3" size= "20" ></p>

</form>

<script Language = "JavaScript" >

function multiply() {

document.frmMultiply.T3.value = document.frmMultiply.T1.value * document.frmMultiply.T2.value

}

</script>