He Longfei has 10 candies, and he wants to distribute them to Li Yanda, You Zili, and Bi Yanzhao. He wants to put the candies in several boxes, so that no matter how they are divided, they can be given to three people directly without opening the boxes. Ask at least how many boxes do you need?
贺龙飞有10颗糖，要分给李言达、尤自立、毕研钊三个人．他想把糖装几个盒子，使得无论怎么分，都可以直接拿给三人而不需要打开盒子．问至少需要装几个盒子？
<result>4</result>