Subtract a number from 459, divide the difference by this number, the quotient is 8, then what is this number?
从459里减去一个数，得到的差再除以这个数，商是8，那么这个数是多少．
<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">459 / 9</gadget>
<output>51</output>

<result>51</result>