□/8=105…□, what is the largest dividend.
□/8=105…□，被除数最大是多少．
<gadget id="calculator">105 * 8</gadget>
<output>840</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">840 + 7</gadget>
<output>847</output>

<result>847</result>