For a 10-meter-long rope, first cut off (3/4), then cut off (3/4) meters, how many meters are left.
10米长的绳子，先截下(3/4)，再截下(3/4)米，还剩多少米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">10 * (3/4)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">10 - (15/2) - (3/4)</gadget>
<output>7/4 = around 1.75</output>

<result>7/4 = around 1.75</result>