8 meters long rope, how many meters are left after cutting (3/8).
8米长的绳子，剪下了(3/8)还剩多少米．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">8 * (5/8)</gadget>
<output>5</output>

<result>5</result>