32/{(16/(2*□))*4}=8, □=how much.
32/{(16/(2*□))*4}=8，□=多少．
<gadget id="calculator">32 / 8 / 4</gadget>
<output>1</output>

<gadget id="calculator">16 / 1 / 2</gadget>
<output>8</output>

<result>8</result>