78749402 divided by 129 
Our goal is to divide 78749402 by 129.

Let's proceed to step 1:
When dividing 7 by 129, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 129

Advancing to step 2:
If we divide 78 by 129, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Grab the next digit (7) from the dividend, add it to 78, then carry on: 787 / 129

On to step 3:
When dividing 787 by 129, we get 6 with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 774 from 787 to get 13.
Include the next digit (4) from the dividend after 13, then repeat: 134 / 129

Step 4:
129 can be fit into 134 1 times, resulting in a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 61.0
Subtracting 129 from 134 leaves us with 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 129

On to step 5:
129 can be fit into 59 0 times, resulting in a remainder of 59.
The next digit of our result is 0. 
Result so far: 610.0
If we subtract 0 from 59, we get 59.
Bring next digit (4) of the dividend behind the 59 and repeat the process: 594 / 129

Advancing to step 6:
129 can be fit into 594 4 times, resulting in a remainder of 78.
The next digit of our result is 4. 
Result so far: 6104.0
If we take 516 away from 594, we end up with 78.
Grab the next digit (0) from the dividend, add it to 78, then carry on: 780 / 129

Advancing to step 7:
When dividing 780 by 129, we get 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 61046.0
Deduct 774 from 780 and we're left with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 129

Going ahead to step 8:
The number 129 fits into 62 0 times, leaving a remainder of 62.
Write down 0 as next digit of the result. 
Result so far: 610460.0
If we take 0 away from 62, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 9:
620 divided by 129 is 4 with a remainder of 104.
Write down 4 as next digit of the result. 
Result so far: 610460.4
Subtracting 516 from 620 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 10:
The number 129 fits into 1040 8 times, leaving a remainder of 8.
The next digit of our result is 8. 
Result so far: 610460.48
Deduct 1032 from 1040 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 11:
When dividing 80 by 129, we get 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 610460.48
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 12:
When dividing 800 by 129, we get 6 with a remainder of 26.
Put 6 as the next digit of the answer. 
Result so far: 610460.4806
If we take 774 away from 800, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 13:
260 divided by 129 is 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 610460.48062
Subtract 258 from 260 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 14:
129 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 610460.48062
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 15:
200 divided by 129 is 1 with a remainder of 71.
Use 1 as the next digit of our solution. 
Result so far: 610460.4806201
The remainder is 71 after subtracting 129 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 16:
129 goes into 710 5 times with a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 610460.48062015
The remainder is 65 after subtracting 645 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The final result is 610460.48062015 with a remainder of 6.5e-08.