Warehouse A stores 104 tons of grain, and Warehouse B stores 140 tons of grain. If the grain stored in Warehouse A is three times that of Warehouse B, how many tons of grain must be transported from Warehouse B to Warehouse A?
甲仓库存粮104吨，乙仓库存粮140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存粮放入甲仓库？
<gadget id="calculator">104 + 140</gadget>
<output>244</output>

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

<gadget id="calculator">244 / 4</gadget>
<output>61</output>

<gadget id="calculator">140 - 61</gadget>
<output>79</output>

<result>79</result>