There are two boxes of oranges, A and B, and there are 120 oranges in box B. If 20 oranges are taken out from box A and put into box B, the number of oranges in the two boxes will be the same. How many oranges are there in box A?
有甲、乙两箱桔子，乙箱中有桔子120个，如果从甲箱中取出20个放入乙箱，两箱桔子个数就一样多，原来甲箱有多少个桔子？
<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">120 + 40</gadget>
<output>160</output>

<result>160</result>