The rice stored in Warehouse A is three times that of Warehouse B, and 850 kg is shipped from Warehouse A and 50 kg is shipped from Warehouse B, so the flour in the two warehouses is equal. Ask: How many kilograms is more in warehouse A than in warehouse B?
甲仓库所存的大米是乙仓库的3倍，从甲仓库运出850千克，从乙仓库运出50千克，则两个仓库的面粉相等．求：甲仓库比乙仓库多多少千克？
<gadget id="calculator">850 - 50</gadget>
<output>800</output>

<result>800</result>