A rope is 20 meters long, and it takes (3/5) meters to tie a box. After tying 18 boxes, how many meters are left?
一根绳子长20米，捆一个盒子用(3/5)米，捆好18个后，还剩多少米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 18</gadget>
<output>54/5 = around 10.8</output>

<gadget id="calculator">20 - (54/5)</gadget>
<output>46/5 = around 9.2</output>

<result>46/5 = around 9.2</result>