2 tractors plow 1 hectare in 4 hours. According to this calculation, how many hours will it take to plow 2.5 hectares with such 2 tractors?
2台拖拉机4小时耕地1公顷，照这样计算，用这样2台拖拉机耕地2.5公顷地，需要多少小时？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2.5 / (1/4)</gadget>
<output>10</output>

<result>10</result>