We look at the division of 77178566 by 869 
Our goal is to divide 77178566 by 869.

Moving on to step 1:
If we divide 7 by 869, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 869

Advancing to step 2:
869 goes into 77 0 times with a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Bring next digit (1) of the dividend behind the 77 and repeat the process: 771 / 869

Step 3:
771 divided by 869 is 0 with a remainder of 771.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 771 leaves us with 771.
Take the next digit (7) from the dividend and append it to 771, then repeat: 7717 / 869

Let's proceed to step 4:
869 can be fit into 7717 8 times, resulting in a remainder of 765.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 6952 from 7717 and we're left with 765.
Include the next digit (8) from the dividend after 765, then repeat: 7658 / 869

Going ahead to step 5:
If we divide 7658 by 869, we get 8 and a remainder of 706.
The number 8 becomes the next digit in our result. 
Result so far: 88.0
If we subtract 6952 from 7658, we get 706.
Fetch the next digit (5) from the dividend, attach it to 706 and continue: 7065 / 869

On to step 6:
7065 divided by 869 is 8 with a remainder of 113.
Put 8 as the next digit of the answer. 
Result so far: 888.0
Subtracting 6952 from 7065 leaves us with 113.
Grab the next digit (6) from the dividend, add it to 113, then carry on: 1136 / 869

Advancing to step 7:
When dividing 1136 by 869, we get 1 with a remainder of 267.
Put 1 as the next digit of the answer. 
Result so far: 8881.0
If we subtract 869 from 1136, we get 267.
Bring next digit (6) of the dividend behind the 267 and repeat the process: 2676 / 869

Advancing to step 8:
The number 869 fits into 2676 3 times, leaving a remainder of 69.
The number 3 becomes the next digit in our result. 
Result so far: 88813.0
If we take 2607 away from 2676, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 9:
869 goes into 690 0 times with a remainder of 690.
Record the quotient 0 as the next digit in the result. 
Result so far: 88813.0
Deduct 0 from 690 and we're left with 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6900, and continue the process.

Step 10:
869 goes into 6900 7 times with a remainder of 817.
Put 7 as the next digit of the answer. 
Result so far: 88813.07
Subtract 6083 from 6900 to get 817.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8170, and continue the process.

Going ahead to step 11:
The number 869 fits into 8170 9 times, leaving a remainder of 349.
Record the quotient 9 as the next digit in the result. 
Result so far: 88813.079
If we take 7821 away from 8170, we end up with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Step 12:
When dividing 3490 by 869, we get 4 with a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 88813.0794
Deduct 3476 from 3490 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 13:
If we divide 140 by 869, we get 0 and a remainder of 140.
Use 0 as the next digit of our solution. 
Result so far: 88813.0794
Subtract 0 from 140 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 14:
1400 divided by 869 is 1 with a remainder of 531.
Use 1 as the next digit of our solution. 
Result so far: 88813.079401
Subtract 869 from 1400 to get 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

On to step 15:
869 goes into 5310 6 times with a remainder of 96.
The next digit of our result is 6. 
Result so far: 88813.0794016
If we take 5214 away from 5310, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Step 16:
960 divided by 869 is 1 with a remainder of 91.
The number 1 becomes the next digit in our result. 
Result so far: 88813.07940161
Subtracting 869 from 960 leaves us with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

The final result is 88813.07940161 with a remainder of 9.1e-08.