When two numbers are divided, the quotient is 9 and the remainder is 6. What is the smallest divisor?
两个数相除，商是9，余数是6，被除数最小是多少．
<gadget id="calculator">9 * 7</gadget>
<output>63</output>

<gadget id="calculator">63 + 6</gadget>
<output>69</output>

<result>69</result>