There are three piles of Go pieces, each with 90 pieces. The number of black pieces in the first pile is the same as that of the white pieces in the second pile, and (1/3) of the third pile are white pieces. How many white pieces are there in these three piles?
有三堆围棋子，每堆90枚，第一堆中的黑子与第二堆的白子同样多，第三堆中有(1/3)是白子，这三堆棋子中共有白子多少枚？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">90 * (1/3)</gadget>
<output>30</output>

<gadget id="calculator">90 + 30</gadget>
<output>120</output>

<result>120</result>