Pile A is three times as many pieces as Pile B. If you take 20 pieces from Pile A to Pile B, there will be the same number of pieces in both piles. How many pieces are there in Pile A?
甲堆棋子是乙堆的3倍，如果从甲堆拿20粒给乙堆，则两堆同样多，那么甲堆原来有多少粒．
<gadget id="calculator">20 + 20</gadget>
<output>40</output>

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

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>