Xiaodong and Xiaoqing compete with each other. They take turns to take chess pieces from a box of 30 pieces. They take at least 1 piece and at most 2 pieces. Whoever gets the last piece wins. Please help Xiaoqing design, should he take it first or last? How to get it to ensure victory?
小东和小青两人比赛，两人轮流从30个棋子的盒子里拿棋子，最少拿1个，最多拿2个，谁拿到最后一个棋子，谁就获胜．请你帮小青设计，他应该先拿还是后拿？怎样拿才能确保获胜？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<result>3</result>