If ○/3=△, □*△=54, □=9, then ○=how much.
如果○/3=△，□*△=54，□=9，那么○=多少．
<gadget id="calculator">54 / 9</gadget>
<output>6</output>

<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<result>18</result>