A piece of cloth has (7/8) meters, if (1/4) meters are used up, how many meters are left?
一块布料有(7/8)米，用去(1/4)米，还剩多少米．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(7/8) - (1/4)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>