We're dividing 54086256 by 129 
We want to divide 54086256 by 129.

Moving on to step 1:
5 divided by 129 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 129

Advancing to step 2:
129 goes into 54 0 times with a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 54, we end up with 54.
Append the next digit (0) from the dividend to 54 and continue with: 540 / 129

Going ahead to step 3:
When dividing 540 by 129, we get 4 with a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 516 from 540 to get 24.
Include the next digit (8) from the dividend after 24, then repeat: 248 / 129

Moving on to step 4:
The number 129 fits into 248 1 times, leaving a remainder of 119.
Put 1 as the next digit of the answer. 
Result so far: 41.0
If we take 129 away from 248, we end up with 119.
Append the next digit (6) from the dividend to 119 and continue with: 1196 / 129

Let's proceed to step 5:
129 can be fit into 1196 9 times, resulting in a remainder of 35.
Record the quotient 9 as the next digit in the result. 
Result so far: 419.0
Subtract 1161 from 1196 to get 35.
Append the next digit (2) from the dividend to 35 and continue with: 352 / 129

On to step 6:
352 divided by 129 is 2 with a remainder of 94.
The number 2 becomes the next digit in our result. 
Result so far: 4192.0
If we subtract 258 from 352, we get 94.
Take the next digit (5) from the dividend and append it to 94, then repeat: 945 / 129

Going ahead to step 7:
If we divide 945 by 129, we get 7 and a remainder of 42.
Use 7 as the next digit of our solution. 
Result so far: 41927.0
The remainder is 42 after subtracting 903 from 945.
Bring next digit (6) of the dividend behind the 42 and repeat the process: 426 / 129

Going ahead to step 8:
129 can be fit into 426 3 times, resulting in a remainder of 39.
Write down 3 as next digit of the result. 
Result so far: 419273.0
Subtract 387 from 426 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 9:
129 can be fit into 390 3 times, resulting in a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 419273.3
Subtracting 387 from 390 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 10:
129 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 419273.3
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 11:
129 goes into 300 2 times with a remainder of 42.
Write down 2 as next digit of the result. 
Result so far: 419273.302
Subtracting 258 from 300 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 12:
129 goes into 420 3 times with a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 419273.3023
If we subtract 387 from 420, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 13:
If we divide 330 by 129, we get 2 and a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 419273.30232
The remainder is 72 after subtracting 258 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 14:
720 divided by 129 is 5 with a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 419273.302325
If we take 645 away from 720, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 15:
The number 129 fits into 750 5 times, leaving a remainder of 105.
Put 5 as the next digit of the answer. 
Result so far: 419273.3023255
If we take 645 away from 750, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

In conclusion, the division gives 419273.3023255 with a balance of 1.05e-06.