84125877 divided by 399 
Our goal is to divide 84125877 by 399.

Moving on to step 1:
If we divide 8 by 399, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 399

Moving on to step 2:
84 divided by 399 is 0 with a remainder of 84.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 84 leaves us with 84.
Grab the next digit (1) from the dividend, add it to 84, then carry on: 841 / 399

Advancing to step 3:
When dividing 841 by 399, we get 2 with a remainder of 43.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 798 away from 841, we end up with 43.
Append the next digit (2) from the dividend to 43 and continue with: 432 / 399

Let's proceed to step 4:
399 goes into 432 1 times with a remainder of 33.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Deduct 399 from 432 and we're left with 33.
Include the next digit (5) from the dividend after 33, then repeat: 335 / 399

Step 5:
If we divide 335 by 399, we get 0 and a remainder of 335.
Put 0 as the next digit of the answer. 
Result so far: 210.0
Subtracting 0 from 335 leaves us with 335.
Append the next digit (8) from the dividend to 335 and continue with: 3358 / 399

Going ahead to step 6:
399 goes into 3358 8 times with a remainder of 166.
The number 8 becomes the next digit in our result. 
Result so far: 2108.0
Deduct 3192 from 3358 and we're left with 166.
Bring next digit (7) of the dividend behind the 166 and repeat the process: 1667 / 399

Going ahead to step 7:
1667 divided by 399 is 4 with a remainder of 71.
The number 4 becomes the next digit in our result. 
Result so far: 21084.0
Deduct 1596 from 1667 and we're left with 71.
Fetch the next digit (7) from the dividend, attach it to 71 and continue: 717 / 399

Moving on to step 8:
399 goes into 717 1 times with a remainder of 318.
Record the quotient 1 as the next digit in the result. 
Result so far: 210841.0
The remainder is 318 after subtracting 399 from 717.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Step 9:
When dividing 3180 by 399, we get 7 with a remainder of 387.
Record the quotient 7 as the next digit in the result. 
Result so far: 210841.7
If we subtract 2793 from 3180, we get 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Advancing to step 10:
399 goes into 3870 9 times with a remainder of 279.
Use 9 as the next digit of our solution. 
Result so far: 210841.79
The remainder is 279 after subtracting 3591 from 3870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Step 11:
399 goes into 2790 6 times with a remainder of 396.
The number 6 becomes the next digit in our result. 
Result so far: 210841.796
If we take 2394 away from 2790, we end up with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Let's proceed to step 12:
3960 divided by 399 is 9 with a remainder of 369.
Record the quotient 9 as the next digit in the result. 
Result so far: 210841.7969
If we subtract 3591 from 3960, we get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Advancing to step 13:
The number 399 fits into 3690 9 times, leaving a remainder of 99.
Record the quotient 9 as the next digit in the result. 
Result so far: 210841.79699
If we take 3591 away from 3690, we end up with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

After the division, we end up with 210841.79699 and a remainder of 9.9e-05.