We look at the division of 39759739 by 129 
We want to divide 39759739 by 129.

Let's proceed to step 1:
When dividing 3 by 129, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 129

Let's proceed to step 2:
If we divide 39 by 129, we get 0 and a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Fetch the next digit (7) from the dividend, attach it to 39 and continue: 397 / 129

Going ahead to step 3:
When dividing 397 by 129, we get 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 387 away from 397, we end up with 10.
Grab the next digit (5) from the dividend, add it to 10, then carry on: 105 / 129

Going ahead to step 4:
105 divided by 129 is 0 with a remainder of 105.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
If we take 0 away from 105, we end up with 105.
Bring next digit (9) of the dividend behind the 105 and repeat the process: 1059 / 129

Going ahead to step 5:
When dividing 1059 by 129, we get 8 with a remainder of 27.
The number 8 becomes the next digit in our result. 
Result so far: 308.0
The remainder is 27 after subtracting 1032 from 1059.
Append the next digit (7) from the dividend to 27 and continue with: 277 / 129

Moving on to step 6:
277 divided by 129 is 2 with a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 3082.0
If we take 258 away from 277, we end up with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 129

Let's proceed to step 7:
129 goes into 193 1 times with a remainder of 64.
Put 1 as the next digit of the answer. 
Result so far: 30821.0
If we subtract 129 from 193, we get 64.
Grab the next digit (9) from the dividend, add it to 64, then carry on: 649 / 129

Advancing to step 8:
129 can be fit into 649 5 times, resulting in a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 308215.0
If we take 645 away from 649, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
129 can be fit into 40 0 times, resulting in a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 308215.0
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 10:
If we divide 400 by 129, we get 3 and a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 308215.03
If we subtract 387 from 400, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 11:
129 can be fit into 130 1 times, resulting in a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 308215.031
The remainder is 1 after subtracting 129 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 12:
The number 129 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 308215.031
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 13:
129 goes into 100 0 times with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 308215.031
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 308215.031, with a leftover of 0.0001.