52111311 ÷ 129 
We want to divide 52111311 by 129.

On to step 1:
129 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 129

Going ahead to step 2:
129 goes into 52 0 times with a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 52 leaves us with 52.
Grab the next digit (1) from the dividend, add it to 52, then carry on: 521 / 129

Going ahead to step 3:
If we divide 521 by 129, we get 4 and a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 516 away from 521, we end up with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 129

Moving on to step 4:
129 can be fit into 51 0 times, resulting in a remainder of 51.
The next digit of our result is 0. 
Result so far: 40.0
Subtract 0 from 51 to get 51.
Include the next digit (1) from the dividend after 51, then repeat: 511 / 129

Advancing to step 5:
129 goes into 511 3 times with a remainder of 124.
The number 3 becomes the next digit in our result. 
Result so far: 403.0
Deduct 387 from 511 and we're left with 124.
Take the next digit (3) from the dividend and append it to 124, then repeat: 1243 / 129

On to step 6:
129 goes into 1243 9 times with a remainder of 82.
The number 9 becomes the next digit in our result. 
Result so far: 4039.0
Subtracting 1161 from 1243 leaves us with 82.
Grab the next digit (1) from the dividend, add it to 82, then carry on: 821 / 129

Let's proceed to step 7:
821 divided by 129 is 6 with a remainder of 47.
Put 6 as the next digit of the answer. 
Result so far: 40396.0
Subtracting 774 from 821 leaves us with 47.
Grab the next digit (1) from the dividend, add it to 47, then carry on: 471 / 129

On to step 8:
The number 129 fits into 471 3 times, leaving a remainder of 84.
The next digit of our result is 3. 
Result so far: 403963.0
Subtract 387 from 471 to 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.

On to step 9:
129 can be fit into 840 6 times, resulting in a remainder of 66.
Put 6 as the next digit of the answer. 
Result so far: 403963.6
Subtract 774 from 840 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 10:
When dividing 660 by 129, we get 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 403963.65
If we take 645 away from 660, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 11:
When dividing 150 by 129, we get 1 with a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 403963.651
Deduct 129 from 150 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 12:
129 can be fit into 210 1 times, resulting in a remainder of 81.
Use 1 as the next digit of our solution. 
Result so far: 403963.6511
If we subtract 129 from 210, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

The quotient of the division is 403963.6511, and the remainder is 0.00081.