0*5+5/5=how much.
0*5+5/5=多少．
<gadget id="calculator">0 * 5</gadget>
<output>0</output>

<gadget id="calculator">5 / 5</gadget>
<output>1</output>

<gadget id="calculator">0 + 1</gadget>
<output>1</output>

<result>1</result>