There are three piles of Go pieces, each with 60 pieces, the first pile has the same number of black pieces as the second white pieces, the ratio of the third pile of white pieces to the total number of white pieces in the three piles is 1:4. How many white pieces are there in these three piles of chess pieces?
有三堆围棋子，每堆60枚，第一堆的黑子与第二的白子同样多，第三堆白子与三堆围棋子中白子总数的比是1：4．这三堆棋子一共有白子多少枚？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">60 * (1/3)</gadget>
<output>20</output>

<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<result>80</result>