We're dividing 15946952 by 399 
Our goal is to divide 15946952 by 399.

Let's proceed to step 1:
When dividing 1 by 399, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 399

Advancing to step 2:
When dividing 15 by 399, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 399

Let's proceed to step 3:
If we divide 159 by 399, we get 0 and a remainder of 159.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 159 and we're left with 159.
Take the next digit (4) from the dividend and append it to 159, then repeat: 1594 / 399

Let's proceed to step 4:
399 goes into 1594 3 times with a remainder of 397.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 1197 from 1594, we get 397.
Fetch the next digit (6) from the dividend, attach it to 397 and continue: 3976 / 399

On to step 5:
399 goes into 3976 9 times with a remainder of 385.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
If we take 3591 away from 3976, we end up with 385.
Bring next digit (9) of the dividend behind the 385 and repeat the process: 3859 / 399

Moving on to step 6:
399 can be fit into 3859 9 times, resulting in a remainder of 268.
Put 9 as the next digit of the answer. 
Result so far: 399.0
Subtract 3591 from 3859 to get 268.
Include the next digit (5) from the dividend after 268, then repeat: 2685 / 399

Moving on to step 7:
399 goes into 2685 6 times with a remainder of 291.
The number 6 becomes the next digit in our result. 
Result so far: 3996.0
Subtracting 2394 from 2685 leaves us with 291.
Include the next digit (2) from the dividend after 291, then repeat: 2912 / 399

Advancing to step 8:
2912 divided by 399 is 7 with a remainder of 119.
Use 7 as the next digit of our solution. 
Result so far: 39967.0
The remainder is 119 after subtracting 2793 from 2912.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Moving on to step 9:
399 can be fit into 1190 2 times, resulting in a remainder of 392.
Record the quotient 2 as the next digit in the result. 
Result so far: 39967.2
The remainder is 392 after subtracting 798 from 1190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Step 10:
399 goes into 3920 9 times with a remainder of 329.
The number 9 becomes the next digit in our result. 
Result so far: 39967.29
If we take 3591 away from 3920, we end up with 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Step 11:
When dividing 3290 by 399, we get 8 with a remainder of 98.
Put 8 as the next digit of the answer. 
Result so far: 39967.298
Subtracting 3192 from 3290 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 12:
399 goes into 980 2 times with a remainder of 182.
Record the quotient 2 as the next digit in the result. 
Result so far: 39967.2982
Subtract 798 from 980 to get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Advancing to step 13:
The number 399 fits into 1820 4 times, leaving a remainder of 224.
Record the quotient 4 as the next digit in the result. 
Result so far: 39967.29824
If we subtract 1596 from 1820, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 14:
When dividing 2240 by 399, we get 5 with a remainder of 245.
Put 5 as the next digit of the answer. 
Result so far: 39967.298245
The remainder is 245 after subtracting 1995 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Advancing to step 15:
399 goes into 2450 6 times with a remainder of 56.
Write down 6 as next digit of the result. 
Result so far: 39967.2982456
Deduct 2394 from 2450 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 16:
If we divide 560 by 399, we get 1 and a remainder of 161.
The next digit of our result is 1. 
Result so far: 39967.29824561
Subtracting 399 from 560 leaves us with 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

The final result is 39967.29824561 with a remainder of 1.61e-07.