64-64*0/32=how much
64-64*0/32=多少
<gadget id="calculator">0 / 32</gadget>
<output>0</output>

<gadget id="calculator">64 * 0</gadget>
<output>0</output>

<gadget id="calculator">64 - 0</gadget>
<output>64</output>

<result>64</result>