51798397 divided by 129 
Our goal is to divide 51798397 by 129.

Step 1:
The number 129 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 129

Moving on to step 2:
If we divide 51 by 129, we get 0 and a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Grab the next digit (7) from the dividend, add it to 51, then carry on: 517 / 129

Advancing to step 3:
129 can be fit into 517 4 times, resulting in a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 516 away from 517, we end up with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 129

Step 4:
19 divided by 129 is 0 with a remainder of 19.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Deduct 0 from 19 and we're left with 19.
Take the next digit (8) from the dividend and append it to 19, then repeat: 198 / 129

Let's proceed to step 5:
129 goes into 198 1 times with a remainder of 69.
The number 1 becomes the next digit in our result. 
Result so far: 401.0
If we take 129 away from 198, we end up with 69.
Bring next digit (3) of the dividend behind the 69 and repeat the process: 693 / 129

Advancing to step 6:
129 goes into 693 5 times with a remainder of 48.
Use 5 as the next digit of our solution. 
Result so far: 4015.0
Subtracting 645 from 693 leaves us with 48.
Grab the next digit (9) from the dividend, add it to 48, then carry on: 489 / 129

Advancing to step 7:
129 goes into 489 3 times with a remainder of 102.
The next digit of our result is 3. 
Result so far: 40153.0
Subtract 387 from 489 to get 102.
Bring next digit (7) of the dividend behind the 102 and repeat the process: 1027 / 129

Going ahead to step 8:
When dividing 1027 by 129, we get 7 with a remainder of 124.
Record the quotient 7 as the next digit in the result. 
Result so far: 401537.0
Subtract 903 from 1027 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 9:
When dividing 1240 by 129, we get 9 with a remainder of 79.
Write down 9 as next digit of the result. 
Result so far: 401537.9
The remainder is 79 after subtracting 1161 from 1240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 10:
The number 129 fits into 790 6 times, leaving a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 401537.96
If we take 774 away from 790, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
The number 129 fits into 160 1 times, leaving a remainder of 31.
The number 1 becomes the next digit in our result. 
Result so far: 401537.961
If we take 129 away from 160, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 12:
310 divided by 129 is 2 with a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 401537.9612
If we take 258 away from 310, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 13:
If we divide 520 by 129, we get 4 and a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 401537.96124
The remainder is 4 after subtracting 516 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 14:
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: 401537.96124
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 15:
129 can be fit into 400 3 times, resulting in a remainder of 13.
The next digit of our result is 3. 
Result so far: 401537.9612403
The remainder is 13 after subtracting 387 from 400.
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 16:
When dividing 130 by 129, we get 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 401537.96124031
If we take 129 away from 130, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 401537.96124031 with a remainder of 1e-09.