The result of 32*0 is equal to the result of how many.
32*0的结果与多少的结果相等．
<gadget id="calculator">32 * 0</gadget>
<output>0</output>

<gadget id="calculator">32 - 0</gadget>
<output>32</output>

<gadget id="calculator">32 + 0</gadget>
<output>32</output>

<gadget id="calculator">32 - 32</gadget>
<output>0</output>

<result>0</result>