13986974 divided by 799 
We want to divide 13986974 by 799.

On to step 1:
799 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 799

On to step 2:
799 goes into 13 0 times with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 799

Let's proceed to step 3:
799 can be fit into 139 0 times, resulting in a remainder of 139.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 139, we get 139.
Fetch the next digit (8) from the dividend, attach it to 139 and continue: 1398 / 799

On to step 4:
799 goes into 1398 1 times with a remainder of 599.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 799 from 1398, we get 599.
Append the next digit (6) from the dividend to 599 and continue with: 5996 / 799

Going ahead to step 5:
The number 799 fits into 5996 7 times, leaving a remainder of 403.
The next digit of our result is 7. 
Result so far: 17.0
Deduct 5593 from 5996 and we're left with 403.
Grab the next digit (9) from the dividend, add it to 403, then carry on: 4039 / 799

Let's proceed to step 6:
4039 divided by 799 is 5 with a remainder of 44.
Record the quotient 5 as the next digit in the result. 
Result so far: 175.0
If we take 3995 away from 4039, we end up with 44.
Include the next digit (7) from the dividend after 44, then repeat: 447 / 799

Step 7:
The number 799 fits into 447 0 times, leaving a remainder of 447.
Put 0 as the next digit of the answer. 
Result so far: 1750.0
If we take 0 away from 447, we end up with 447.
Append the next digit (4) from the dividend to 447 and continue with: 4474 / 799

Advancing to step 8:
When dividing 4474 by 799, we get 5 with a remainder of 479.
The next digit of our result is 5. 
Result so far: 17505.0
If we take 3995 away from 4474, we end up with 479.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Step 9:
799 goes into 4790 5 times with a remainder of 795.
Record the quotient 5 as the next digit in the result. 
Result so far: 17505.5
The remainder is 795 after subtracting 3995 from 4790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7950, and continue the process.

Step 10:
799 can be fit into 7950 9 times, resulting in a remainder of 759.
Put 9 as the next digit of the answer. 
Result so far: 17505.59
If we take 7191 away from 7950, we end up with 759.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7590, and continue the process.

Step 11:
7590 divided by 799 is 9 with a remainder of 399.
Use 9 as the next digit of our solution. 
Result so far: 17505.599
If we subtract 7191 from 7590, we get 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Our division results in 17505.599 with a remaining 0.0399.