The divisor is 9, the quotient and the divisor are the same, what is the largest dividend
除数是9，商和除数相同，则被除数最大是多少
<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>