Mix 36 tons of concrete, of which cement accounts for (1/4), yellow sand takes 7.2 tons, and the rest is gravel, which accounts for ((())/(())).
拌制36吨的混凝土，其中水泥占(1/4)，黄沙需7.2吨，其余的是石子，石子占((())/(()))．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">36 * (1/4)</gadget>
<output>9</output>

<gadget id="calculator">36 - 9 - 7.2</gadget>
<output>19.8</output>

<gadget id="calculator">19.8 / 36</gadget>
<output>0.55</output>

<result>0.55</result>