There are two piles of chess pieces, A and B. If pile A takes out 12 pieces and puts them into pile B, then pile B has 5 more pieces than pile A. How many pieces are there in pile A than pile B?
现有甲、乙两堆棋子，如果甲堆中拿出12枚棋子放入乙堆，则乙堆比甲多5枚，请问原来甲堆比乙堆多多少枚棋子？
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">24 - 5</gadget>
<output>19</output>

<result>19</result>