A watermelon is distributed to 16 children, each eats 1 piece, cut vertically, and the minimum number of cuts is required.
一只西瓜分给16个小朋友吃，每人吃1块，竖直切，最少要切多少刀．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<result>8</result>