One water pump (3/5) can pump 60 tons of water per hour. At this rate, how many hours will it take to pump 180 tons of water?
一台水泵(3/5)小时可抽水60吨．照这样的速度，要抽水180吨，需要多少小时？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / (3/5)</gadget>
<output>100</output>

<gadget id="calculator">180 / 100</gadget>
<output>9/5 = around 1.8</output>

<result>9/5 = around 1.8</result>