66780 ÷ 8 = 8347 R4
Alright, let's work through the division of 66780 by 8 step by step.

Step 1:
8 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 8

Step 2:
8 goes into 66 8 times with a remainder of 2.
Write down 8 as next digit of of the result. 
Result so far: 8
Subtract 64 from 66 to get 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 8

Step 3:
8 goes into 27 3 times with a remainder of 3.
Write down 3 as next digit of of the result. 
Result so far: 83
Subtract 24 from 27 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 8

Step 4:
8 goes into 38 4 times with a remainder of 6.
Write down 4 as next digit of of the result. 
Result so far: 834
Subtract 32 from 38 to get 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 8

Step 5:
8 goes into 60 7 times with a remainder of 4.
Write down 7 as next digit of of the result. 
Result so far: 8347
Subtract 56 from 60 to get 4.

The final result is 8347 with a remainder of 4.