A 6 meter long rope. Cut off (3/4) of the full length for the first time, cut off (3/5) meters for the second time, how many meters are left.
一根6米长的绳子．第一次截去全长的(3/4)，第二次截去(3/5)米，还剩多少米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">6 * (3/4)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">6 - (9/2) - (3/5)</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>