When a number is divided by 8, the quotient is 7 and the remainder is the largest. What is the number?
一个数除以8，商是7，余数最大，这个数是多少．
<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>