A pile of 24 tons of cement has been used (3/4), how many tons are left?
一堆水泥24吨，已用去(3/4)，还剩多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">24 * (1/4)</gadget>
<output>6</output>

<result>6</result>