A rope uses (1/4) more than 6 meters, and there are 12 meters left, what is the total length in meters?
一根绳子用去(1/4)多6米，还剩12米，全长多少米．
<gadget id="calculator">12 + 6</gadget>
<output>18</output>

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

<gadget id="calculator">18 / (1/4)</gadget>
<output>72</output>

<result>72</result>