A production team wants to spray pesticides on the wheat fields, and the amount sprayed per hectare is the same. The original plan was to spray 2 kilograms of pesticides per hectare, but there was still a shortage of 10 kilograms. How many hectares of wheat fields should be sprayed with pesticides?
某生产队要给麦田喷洒农药，每公顷麦田喷洒的数量相同，原计划每公顷麦田喷洒农药2千克，还缺10千克，后来计划每公顷麦田喷洒农药3千克，结果农药缺了20千克，一共要给多少公顷麦田喷洒农药？
<gadget id="calculator">20 - 10</gadget>
<output>10</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<result>10</result>