The canteen brings (7/8) tons of coal, but uses (3/4), how many tons are used?
食堂运来(7/8)吨的煤，用去(3/4)，用去多少吨？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(7/8) * (3/4)</gadget>
<output>21/32 = around 0.65625</output>

<result>21/32 = around 0.65625</result>