In the formula "A/9=B...C", where B and C are both single digits, what is the maximum value of A?
在"A/9=B…C"的算式里，其中B和C都是一位数，那么A最大可以是多少．
<gadget id="calculator">9 * 9</gadget>
<output>81</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">81 + 8</gadget>
<output>89</output>

<result>89</result>