Put a bunch of chess pieces in boxes A and B respectively. The number of pieces in box A is 5 more than the number of pieces in box B. If you take out 10 pieces from box A and put them into box B, then A The number of chess pieces in the box is exactly equal to half of the number of chess pieces in box B. How many pieces are there in this pile?
把一堆棋子分别放在甲、乙两个盒中，甲盒中的棋子数比乙盒中的棋子数多5个，如果把甲盒的棋子拿出10个放入乙盒，这时甲盒的棋子数正好等于乙盒棋子数的一半，这堆棋子共有多少个？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 - 10</gadget>
<output>0</output>

<gadget id="calculator">20 + 0</gadget>
<output>20</output>

<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">20 + 20 + 5</gadget>
<output>45</output>

<result>45</result>