There are several piles of chess pieces, the same number of chess pieces in each pile, and each pile of white pieces occupies (1/5), Xiaohong takes half of the pieces from a certain pile, and all the pieces are taken away are black pieces. Among the chess pieces, white pieces account for (6/25). Excuse me, how many piles of chess pieces are there?
有若干堆围棋子，每堆棋子数同样多，且每堆白子都占(1/5)，小红从某堆中拿走一半棋子，而且拿走的都是黑子，这时，在所有的棋子中，白子占(6/25)．请问，共有几堆棋子？
<gadget id="calculator">6 / 25</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">50 * (6/25)</gadget>
<output>12</output>

<gadget id="calculator">100 * (6/25)</gadget>
<output>24</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">100 * (1/5)</gadget>
<output>20</output>

<gadget id="calculator">24 - 20</gadget>
<output>4</output>

<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<result>3</result>