A rope is 5 meters long, first use up (3/4) and then use up (3/4) meters, how many meters are left?
一根绳子长5米，先用去(3/4)，再用去(3/4)米，还剩多少米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 * (3/4)</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">5 - (15/4) - (3/4)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>