What is the difference between the largest seven-digit number and the smallest seven-digit number when the seven numbers 1, 8, 0, 0, 7, 0, and 4 are combined.
将1、8、0、0、7、0、4七个数字组成一个最大的七位数与最小的七位数，其差为多少．
<gadget id="calculator">8_741_000 - 1_000_478</gadget>
<output>7_740_522</output>

<result>7_740_522</result>