There are less than 20 candies, and the average distribution is between 3 children and 5 friends. In the end, there is only one candy left. How many candies are there in total?
一些糖果不到20颗，平均分给3个小朋友和平均分给5个朋友，结果都剩下一颗，这些糖果一共有多少颗？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<result>16</result>