There are two grain depots, A and B, A stores 85 tons of grain, and B stores 63 tons of grain. How many tons of grain should be transferred from warehouse A to warehouse B so that the tons of grain stored in the two grain warehouses are equal?
有甲乙两个粮库，甲库存粮85吨，乙库存粮63吨．要从甲库调多少吨粮食到乙仓库去，才使两个粮库的存粮吨数相等？
<gadget id="calculator">85 - 63</gadget>
<output>22</output>

<gadget id="calculator">22 / 2</gadget>
<output>11</output>

<result>11</result>