A pump can irrigate 196 hectares of land in 7 hours. According to this calculation, how many hours will it take for this pump to irrigate 336 hectares of vegetable fields?
一台抽水机7小时可以浇地196公顷，照这样计算，这台抽水机要浇336公顷的菜地，要用多少小时？
<gadget id="calculator">196 / 7</gadget>
<output>28</output>

<gadget id="calculator">336 / 28</gadget>
<output>12</output>

<result>12</result>