A bag of candy is distributed to kindergarten children, and the average distribution to 15 children or the average distribution to 20 children is just finished, and there is nothing left. How many pieces of candy are there at least in this bag?
一袋糖果分给幼儿园的小朋友，平均分给15个小朋友或平均分给20个小朋友都刚好分完，没有剩余．这袋糖果至少有多少粒？
<gadget id="calculator">3 * 2 * 2 * 5</gadget>
<output>60</output>

<result>60</result>