In the formula □/7=9…□, what is the largest dividend.
算式□/7=9…□中，被除数最大是多少．
<gadget id="calculator">7 * 9</gadget>
<output>63</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">63 + 6</gadget>
<output>69</output>

<result>69</result>