Let's divide 50278804 by 399
Let's see how many times 399 fits into 50278804.

On to step 1:
The number 399 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 399

On to step 2:
399 goes into 50 0 times with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 50 and we're left with 50.
Bring next digit (2) of the dividend behind the 50 and repeat the process: 502 / 399

Step 3:
502 divided by 399 is 1 with a remainder of 103.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 399 from 502 and we're left with 103.
Take the next digit (7) from the dividend and append it to 103, then repeat: 1037 / 399

Moving on to step 4:
399 goes into 1037 2 times with a remainder of 239.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 798 from 1037 and we're left with 239.
Include the next digit (8) from the dividend after 239, then repeat: 2398 / 399

On to step 5:
When dividing 2398 by 399, we get 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 126.0
If we take 2394 away from 2398, we end up with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 399

Let's proceed to step 6:
If we divide 48 by 399, we get 0 and a remainder of 48.
Record the quotient 0 as the next digit in the result. 
Result so far: 1260.0
Deduct 0 from 48 and we're left with 48.
Bring next digit (0) of the dividend behind the 48 and repeat the process: 480 / 399

Moving on to step 7:
If we divide 480 by 399, we get 1 and a remainder of 81.
Use 1 as the next digit of our solution. 
Result so far: 12601.0
If we subtract 399 from 480, we get 81.
Take the next digit (4) from the dividend and append it to 81, then repeat: 814 / 399

Moving on to step 8:
399 can be fit into 814 2 times, resulting in a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 126012.0
Deduct 798 from 814 and we're left 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.

Let's proceed to step 9:
160 divided by 399 is 0 with a remainder of 160.
The number 0 becomes the next digit in our result. 
Result so far: 126012.0
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.

Moving on to step 10:
399 goes into 1600 4 times with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 126012.04
Subtract 1596 from 1600 to get 4.
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 11:
399 goes into 40 0 times with a remainder of 40.
The next digit of our result is 0. 
Result so far: 126012.04
Deduct 0 from 40 and we're left 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.

On to step 12:
The number 399 fits into 400 1 times, leaving a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 126012.0401
The remainder is 1 after subtracting 399 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 13:
399 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 126012.0401
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
399 goes into 100 0 times with a remainder of 100.
The next digit of our result is 0. 
Result so far: 126012.0401
If we subtract 0 from 100, we 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.

In conclusion, the division gives 126012.0401 with a balance of 1e-05.