There are some candies that are less than 20 yuan, and they are distributed to 3 children on average, or distributed to 5 children on average, and 1 yuan is left. How many pieces of candy are there?
有一些糖果不到20块，平均分给3个孩子，或平均分给5个孩子，都剩1块．问有多少块糖果？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

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

<result>16</result>