<form action="CalculatorAction" method="post">
Operand 1:  <input type="text" name="op1" value="0" size="35">
<br>
Operand 2:  <input type="text" name="op2" value="0" size="35">
<br>
<input type="submit" name="action" value="Add">
<input type="submit" name="action" value="Subtract">
</form>



