□/9=68…□, when the remainder is the largest, what is the dividend
□/9=68…□，当余数最大时，被除数是多少
<gadget id="calculator">68 * 9</gadget>
<output>612</output>

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

<gadget id="calculator">612 + 8</gadget>
<output>620</output>

<result>620</result>