When a number is divided by 39, the quotient is the smallest two-digit number and the remainder is 17. What is the number?
一个数除以39，商是最小的两位数，余数是17，这个数是多少．
<gadget id="calculator">10 * 39</gadget>
<output>390</output>

<gadget id="calculator">390 + 17</gadget>
<output>407</output>

<result>407</result>