Two tractors plow 80 hectares in 4 hours. According to this calculation, how many hours will it take for 5 identical tractors to plow 120 hectares? (solution in two ways)
两辆拖拉机4小时耕地80公顷，照这样计算，5辆同样的拖拉机要耕地120公顷，需要多少小时？(用两种方法解)
<gadget id="calculator">80 / 4 / 2</gadget>
<output>10</output>

<gadget id="calculator">120 / 5 / 10</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>