In the Olympiad competition, more than half of the children got five stars, and the teacher planned to reward the five-star children. Teacher Jizhi has prepared model airplanes, robots, small electric fans and pens. Each person can take at most 2, at least one (not the same gift), and at least 10 people have the same gifts. At least how many people in the grade have passed the five-star exam?
奥数比赛，其中一半以上的孩子得了五星，老师准备对五星孩子进行奖励．己知老师准备了模型飞机，机器人，小电风扇和钢笔，己知每人最多拿2个，最少拿一个(不可以拿相同的)，至少有10个人拿的礼品相同，那么老师奥数四年级至少有多少人考了五星？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 10</gadget>
<output>90</output>

<gadget id="calculator">90 + 1</gadget>
<output>91</output>

<result>91</result>