The remainder obtained by dividing a number by 7 is the same as the quotient, and the sum of the numbers in each digit is the smallest. What is the number?
一个数除以7所得的余数和商相同，并且各个数位上的数字和最小，这个数是多少．
<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<gadget id="calculator">35 + 5</gadget>
<output>40</output>

<result>40</result>