Warehouse A has 100 tons of grain, and Warehouse B has 20 tons of grain. How many tons of grain will be transferred from Warehouse A to Warehouse B. The grain in Warehouse B is twice that of Warehouse A?
甲仓库有粮食100吨，乙仓库有粮食20吨，从甲仓库调多少吨粮食到乙仓库，乙仓库的粮食是甲仓库的2倍？
<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<result>60</result>