We're dividing 66771561 by 879 
Our goal is to divide 66771561 by 879.

Moving on to step 1:
The number 879 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 879

Advancing to step 2:
879 can be fit into 66 0 times, resulting in a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Include the next digit (7) from the dividend after 66, then repeat: 667 / 879

Step 3:
879 goes into 667 0 times with a remainder of 667.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 667 leaves us with 667.
Take the next digit (7) from the dividend and append it to 667, then repeat: 6677 / 879

Moving on to step 4:
When dividing 6677 by 879, we get 7 with a remainder of 524.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 6153 away from 6677, we end up with 524.
Include the next digit (1) from the dividend after 524, then repeat: 5241 / 879

Moving on to step 5:
The number 879 fits into 5241 5 times, leaving a remainder of 846.
Write down 5 as next digit of the result. 
Result so far: 75.0
The remainder is 846 after subtracting 4395 from 5241.
Grab the next digit (5) from the dividend, add it to 846, then carry on: 8465 / 879

On to step 6:
879 goes into 8465 9 times with a remainder of 554.
The number 9 becomes the next digit in our result. 
Result so far: 759.0
Subtract 7911 from 8465 to get 554.
Include the next digit (6) from the dividend after 554, then repeat: 5546 / 879

Moving on to step 7:
879 can be fit into 5546 6 times, resulting in a remainder of 272.
The next digit of our result is 6. 
Result so far: 7596.0
Deduct 5274 from 5546 and we're left with 272.
Fetch the next digit (1) from the dividend, attach it to 272 and continue: 2721 / 879

Going ahead to step 8:
2721 divided by 879 is 3 with a remainder of 84.
The number 3 becomes the next digit in our result. 
Result so far: 75963.0
If we subtract 2637 from 2721, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 9:
879 goes into 840 0 times with a remainder of 840.
Record the quotient 0 as the next digit in the result. 
Result so far: 75963.0
Subtracting 0 from 840 leaves us with 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Going ahead to step 10:
If we divide 8400 by 879, we get 9 and a remainder of 489.
Write down 9 as next digit of the result. 
Result so far: 75963.09
If we take 7911 away from 8400, we end up with 489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

On to step 11:
The number 879 fits into 4890 5 times, leaving a remainder of 495.
Put 5 as the next digit of the answer. 
Result so far: 75963.095
Subtract 4395 from 4890 to get 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Going ahead to step 12:
The number 879 fits into 4950 5 times, leaving a remainder of 555.
The next digit of our result is 5. 
Result so far: 75963.0955
The remainder is 555 after subtracting 4395 from 4950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

The final outcome is 75963.0955, with a leftover of 0.00555.