Inverted division method: If the 16-digit number is 5555555△△6666666=77*□, □ is an integer, and the two numbers represented by the two △ in the middle can be the same or different, then □=how much.
倒除法：如果16位数5555555△△6666666=77*□，□是整数，中间的两个△代表的两个数字可以相同也可以不同，则□=多少．
<gadget id="calculator">5_555_555_236_666_666 / 77</gadget>
<output>72_150_068_008_658</output>

<result>72_150_068_008_658</result>