There are 5 yellow balls and 5 green balls of the same size in the box, one ball is taken out at a time, the minimum number of times to get the yellow ball is guaranteed.
盒子里有同样大小的黄球和绿球各5个，一次取出一个球，最少要取多少次能保证拿到黄球．
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>