There are several piles of Go pieces, each pile has the same number of Go pieces, and white pieces account for 22% of each pile. Xiaogang takes half of the pieces from a certain pile, and all the pieces are taken away. White pieces account for 26.4% of the total. Ask: How many piles of Go pieces are there?
有若干堆围棋子，每堆围棋子数一样多，且每堆中白子都占22%，小刚从某一堆中拿走一半棋子，而且拿走的都是黑子，剩下的棋子中白子占总数的26.4%，问：共有多少堆围棋子？
<gadget id="calculator">26.4 / 100</gadget>
<output>0.264</output>

<gadget id="calculator">50 * 0.264</gadget>
<output>13.2</output>

<gadget id="calculator">100 * 0.264</gadget>
<output>26.4</output>

<gadget id="calculator">26.4 - 22</gadget>
<output>4.4</output>

<gadget id="calculator">13.2 / 4.4</gadget>
<output>3</output>

<result>3</result>