Let's divide 87129612 by 777
Our goal is to divide 87129612 by 777.

Step 1:
The number 777 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 777

Let's proceed to step 2:
If we divide 87 by 777, we get 0 and a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Take the next digit (1) from the dividend and append it to 87, then repeat: 871 / 777

Step 3:
The number 777 fits into 871 1 times, leaving a remainder of 94.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 777 away from 871, we end up with 94.
Take the next digit (2) from the dividend and append it to 94, then repeat: 942 / 777

Moving on to step 4:
If we divide 942 by 777, we get 1 and a remainder of 165.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 777 from 942 to get 165.
Include the next digit (9) from the dividend after 165, then repeat: 1659 / 777

Let's proceed to step 5:
777 goes into 1659 2 times with a remainder of 105.
Record the quotient 2 as the next digit in the result. 
Result so far: 112.0
If we subtract 1554 from 1659, we get 105.
Take the next digit (6) from the dividend and append it to 105, then repeat: 1056 / 777

Moving on to step 6:
1056 divided by 777 is 1 with a remainder of 279.
Write down 1 as next digit of the result. 
Result so far: 1121.0
Deduct 777 from 1056 and we're left with 279.
Take the next digit (1) from the dividend and append it to 279, then repeat: 2791 / 777

Advancing to step 7:
When dividing 2791 by 777, we get 3 with a remainder of 460.
Write down 3 as next digit of the result. 
Result so far: 11213.0
The remainder is 460 after subtracting 2331 from 2791.
Append the next digit (2) from the dividend to 460 and continue with: 4602 / 777

Advancing to step 8:
4602 divided by 777 is 5 with a remainder of 717.
The next digit of our result is 5. 
Result so far: 112135.0
Subtract 3885 from 4602 to get 717.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7170, and continue the process.

Let's proceed to step 9:
777 can be fit into 7170 9 times, resulting in a remainder of 177.
Write down 9 as next digit of the result. 
Result so far: 112135.9
Subtracting 6993 from 7170 leaves us with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Moving on to step 10:
777 can be fit into 1770 2 times, resulting in a remainder of 216.
The number 2 becomes the next digit in our result. 
Result so far: 112135.92
If we take 1554 away from 1770, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Moving on to step 11:
If we divide 2160 by 777, we get 2 and a remainder of 606.
Record the quotient 2 as the next digit in the result. 
Result so far: 112135.922
Subtracting 1554 from 2160 leaves us with 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

The final result is 112135.922 with a remainder of 0.0606.