Warehouse A stores 10.8 tons of grain, and Warehouse B stores 14 tons of grain. If the grain stored in Warehouse A is three times that of Warehouse B, how many tons must be transported from Warehouse B to Warehouse A?
甲仓库存粮10.8吨，乙仓库存粮14吨，要使甲仓库的存粮是乙仓库的3倍，那么必须从乙仓库运出多少吨放入甲仓库？
<gadget id="calculator">10.8 + 14</gadget>
<output>24.8</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">24.8 / 4</gadget>
<output>6.2</output>

<gadget id="calculator">14 - 6.2</gadget>
<output>7.8</output>

<result>7.8</result>