There is a two-digit number that is divisible by 8 if it is subtracted from 8, and divisible by 9 if it is subtracted from 9. What is the smallest two-digit number?
有一个两位数，如果减去8就能被8整除，减去9就能被9整除，这个两位数最小是多少．
<gadget id="calculator">8 * 9</gadget>
<output>72</output>

<result>72</result>