We look at the division of 83154311 by 399 
We want to divide 83154311 by 399.

On to step 1:
The number 399 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 399

Let's proceed to step 2:
399 goes into 83 0 times with a remainder of 83.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Append the next digit (1) from the dividend to 83 and continue with: 831 / 399

Step 3:
The number 399 fits into 831 2 times, leaving a remainder of 33.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 798 from 831 to get 33.
Include the next digit (5) from the dividend after 33, then repeat: 335 / 399

Going ahead to step 4:
335 divided by 399 is 0 with a remainder of 335.
The next digit of our result is 0. 
Result so far: 20.0
Subtract 0 from 335 to get 335.
Include the next digit (4) from the dividend after 335, then repeat: 3354 / 399

Going ahead to step 5:
When dividing 3354 by 399, we get 8 with a remainder of 162.
Write down 8 as next digit of the result. 
Result so far: 208.0
If we subtract 3192 from 3354, we get 162.
Append the next digit (3) from the dividend to 162 and continue with: 1623 / 399

Let's proceed to step 6:
The number 399 fits into 1623 4 times, leaving a remainder of 27.
Write down 4 as next digit of the result. 
Result so far: 2084.0
Subtract 1596 from 1623 to get 27.
Grab the next digit (1) from the dividend, add it to 27, then carry on: 271 / 399

Step 7:
When dividing 271 by 399, we get 0 with a remainder of 271.
The number 0 becomes the next digit in our result. 
Result so far: 20840.0
Subtracting 0 from 271 leaves us with 271.
Take the next digit (1) from the dividend and append it to 271, then repeat: 2711 / 399

Moving on to step 8:
399 goes into 2711 6 times with a remainder of 317.
Write down 6 as next digit of the result. 
Result so far: 208406.0
The remainder is 317 after subtracting 2394 from 2711.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Going ahead to step 9:
The number 399 fits into 3170 7 times, leaving a remainder of 377.
Put 7 as the next digit of the answer. 
Result so far: 208406.7
Deduct 2793 from 3170 and we're left with 377.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

Advancing to step 10:
399 can be fit into 3770 9 times, resulting in a remainder of 179.
Use 9 as the next digit of our solution. 
Result so far: 208406.79
The remainder is 179 after subtracting 3591 from 3770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Going ahead to step 11:
If we divide 1790 by 399, we get 4 and a remainder of 194.
Record the quotient 4 as the next digit in the result. 
Result so far: 208406.794
Subtract 1596 from 1790 to get 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

On to step 12:
399 can be fit into 1940 4 times, resulting in a remainder of 344.
The number 4 becomes the next digit in our result. 
Result so far: 208406.7944
If we subtract 1596 from 1940, we get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

The final result is 208406.7944 with a remainder of 0.00344.