Warehouse A stores 57 tons of grain, and Warehouse B stores 32 tons of grain. Warehouse A deposits 4 tons per day, and warehouse B deposits 9 tons per day. After a few days, the grain stored in warehouse A is equal to that in warehouse B.
甲仓库存粮57吨，乙仓库存粮32吨．甲仓库每天存入4吨，乙仓库每天存入9吨，几天后，甲仓库的存粮与乙仓库相等．
<gadget id="calculator">57 - 32</gadget>
<output>25</output>

<gadget id="calculator">9 - 4</gadget>
<output>5</output>

<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<result>5</result>