If the divisor is 8 and the quotient and remainder are the same, what is the largest dividend.
除数是8，商和余数相同，则被除数最大是多少．
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">7 * 8</gadget>
<output>56</output>

<gadget id="calculator">56 + 7</gadget>
<output>63</output>

<result>63</result>