Let's divide 52419040 by 399
Our goal is to divide 52419040 by 399.

Let's proceed to step 1:
5 divided by 399 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.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 399

On to step 2:
399 can be fit into 52 0 times, resulting in a remainder of 52.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 52, we get 52.
Include the next digit (4) from the dividend after 52, then repeat: 524 / 399

On to step 3:
The number 399 fits into 524 1 times, leaving a remainder of 125.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 125 after subtracting 399 from 524.
Grab the next digit (1) from the dividend, add it to 125, then carry on: 1251 / 399

Moving on to step 4:
The number 399 fits into 1251 3 times, leaving a remainder of 54.
Put 3 as the next digit of the answer. 
Result so far: 13.0
The remainder is 54 after subtracting 1197 from 1251.
Bring next digit (9) of the dividend behind the 54 and repeat the process: 549 / 399

Going ahead to step 5:
When dividing 549 by 399, we get 1 with a remainder of 150.
The number 1 becomes the next digit in our result. 
Result so far: 131.0
Subtract 399 from 549 to get 150.
Take the next digit (0) from the dividend and append it to 150, then repeat: 1500 / 399

On to step 6:
1500 divided by 399 is 3 with a remainder of 303.
Write down 3 as next digit of the result. 
Result so far: 1313.0
The remainder is 303 after subtracting 1197 from 1500.
Fetch the next digit (4) from the dividend, attach it to 303 and continue: 3034 / 399

Advancing to step 7:
399 goes into 3034 7 times with a remainder of 241.
The number 7 becomes the next digit in our result. 
Result so far: 13137.0
If we subtract 2793 from 3034, we get 241.
Take the next digit (0) from the dividend and append it to 241, then repeat: 2410 / 399

Advancing to step 8:
2410 divided by 399 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 131376.0
The remainder is 16 after subtracting 2394 from 2410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
160 divided by 399 is 0 with a remainder of 160.
Record the quotient 0 as the next digit in the result. 
Result so far: 131376.0
If we subtract 0 from 160, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 10:
399 can be fit into 1600 4 times, resulting in a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 131376.04
If we take 1596 away from 1600, 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.

On to step 11:
The number 399 fits into 40 0 times, leaving a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 131376.04
Subtracting 0 from 40 leaves us 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 12:
If we divide 400 by 399, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 131376.0401
Subtract 399 from 400 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 13:
When dividing 10 by 399, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 131376.0401
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.

Going ahead to step 14:
If we divide 100 by 399, we get 0 and a remainder of 100.
The next digit of our result is 0. 
Result so far: 131376.0401
Subtracting 0 from 100 leaves us with 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 result is 131376.0401 with a remainder of 1e-05.