In □/10=△…△, the remainder is the same as the quotient, what is the largest dividend.
在□/10=△…△，余数和商相同，被除数最大是多少．
<gadget id="calculator">10 * 9</gadget>
<output>90</output>

<gadget id="calculator">90 + 9</gadget>
<output>99</output>

<result>99</result>