8432649 divided by 399 
Our goal is to divide 8432649 by 399.

Moving on to step 1:
399 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 399

Let's proceed to step 2:
399 goes into 84 0 times with a remainder of 84.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 84, we end up with 84.
Bring next digit (3) of the dividend behind the 84 and repeat the process: 843 / 399

Let's proceed to step 3:
When dividing 843 by 399, we get 2 with a remainder of 45.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 798 from 843 to get 45.
Append the next digit (2) from the dividend to 45 and continue with: 452 / 399

On to step 4:
399 can be fit into 452 1 times, resulting in a remainder of 53.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Deduct 399 from 452 and we're left with 53.
Fetch the next digit (6) from the dividend, attach it to 53 and continue: 536 / 399

On to step 5:
399 can be fit into 536 1 times, resulting in a remainder of 137.
Use 1 as the next digit of our solution. 
Result so far: 211.0
The remainder is 137 after subtracting 399 from 536.
Take the next digit (4) from the dividend and append it to 137, then repeat: 1374 / 399

Going ahead to step 6:
The number 399 fits into 1374 3 times, leaving a remainder of 177.
The next digit of our result is 3. 
Result so far: 2113.0
Subtract 1197 from 1374 to get 177.
Append the next digit (9) from the dividend to 177 and continue with: 1779 / 399

Moving on to step 7:
When dividing 1779 by 399, we get 4 with a remainder of 183.
Record the quotient 4 as the next digit in the result. 
Result so far: 21134.0
If we subtract 1596 from 1779, we get 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Advancing to step 8:
1830 divided by 399 is 4 with a remainder of 234.
The number 4 becomes the next digit in our result. 
Result so far: 21134.4
If we take 1596 away from 1830, we end up with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

On to step 9:
The number 399 fits into 2340 5 times, leaving a remainder of 345.
Put 5 as the next digit of the answer. 
Result so far: 21134.45
Deduct 1995 from 2340 and we're left with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Let's proceed to step 10:
399 can be fit into 3450 8 times, resulting in a remainder of 258.
Write down 8 as next digit of the result. 
Result so far: 21134.458
If we subtract 3192 from 3450, we get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Going ahead to step 11:
399 can be fit into 2580 6 times, resulting in a remainder of 186.
Put 6 as the next digit of the answer. 
Result so far: 21134.4586
The remainder is 186 after subtracting 2394 from 2580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

On to step 12:
399 can be fit into 1860 4 times, resulting in a remainder of 264.
The number 4 becomes the next digit in our result. 
Result so far: 21134.45864
Subtract 1596 from 1860 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Going ahead to step 13:
2640 divided by 399 is 6 with a remainder of 246.
Put 6 as the next digit of the answer. 
Result so far: 21134.458646
Subtract 2394 from 2640 to get 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Let's proceed to step 14:
399 can be fit into 2460 6 times, resulting in a remainder of 66.
The number 6 becomes the next digit in our result. 
Result so far: 21134.4586466
If we take 2394 away from 2460, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

In conclusion, the division gives 21134.4586466 with a balance of 6.6e-07.