There are two warehouses, A and B. Warehouse A stores 68 tons of grain, while Warehouse B stores 55.6 tons of grain. After the number of tons of grain shipped from warehouse B to warehouse A, the grain stored in warehouse A is three times that of warehouse B.
甲、乙两仓库，甲仓库存粮68吨，乙仓库存粮55.6吨，乙仓库运出多少吨粮食给甲仓库后，甲仓库存粮是乙仓库存粮的3倍．
<gadget id="calculator">68 + 55.6</gadget>
<output>123.6</output>

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

<gadget id="calculator">123.6 / 4</gadget>
<output>30.9</output>

<gadget id="calculator">55.6 - 30.9</gadget>
<output>24.7</output>

<result>24.7</result>