When a number is divided by 5, the quotient is 15 and the remainder is 1. What is the number?
一个数除以5，商是15，余数是1，这个数是多少
<gadget id="calculator">15 * 5</gadget>
<output>75</output>

<gadget id="calculator">75 + 1</gadget>
<output>76</output>

<result>76</result>