There are several piles of Go pieces, each pile has the same number of pieces, and each pile has 28% white stones. Xiao Ming takes half of the pieces from a certain pile, and all the pieces are taken away are black pieces. Now, white pieces will account for 32% of all the pieces. So, how many piles of chess pieces are there in total?
有若干堆围棋子，每堆棋子数一样多，且每堆中白子都占28%．小明从某一堆中拿走一半棋子，而且拿走的都是黑子，现在，在所有的棋子中，白子将占32%．那么，共有棋子多少堆？
<gadget id="calculator">32 / 100</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">50 * (8/25)</gadget>
<output>16</output>

<gadget id="calculator">100 * (8/25)</gadget>
<output>32</output>

<gadget id="calculator">32 - 28</gadget>
<output>4</output>

<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<result>4</result>