We look at the division of 20639133 by 799 
We want to divide 20639133 by 799.

Going ahead to step 1:
799 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 799

Advancing to step 2:
If we divide 20 by 799, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 799

Advancing to step 3:
If we divide 206 by 799, we get 0 and a remainder of 206.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 206 leaves us with 206.
Append the next digit (3) from the dividend to 206 and continue with: 2063 / 799

Going ahead to step 4:
2063 divided by 799 is 2 with a remainder of 465.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1598 from 2063 and we're left with 465.
Grab the next digit (9) from the dividend, add it to 465, then carry on: 4659 / 799

Advancing to step 5:
The number 799 fits into 4659 5 times, leaving a remainder of 664.
The next digit of our result is 5. 
Result so far: 25.0
Subtracting 3995 from 4659 leaves us with 664.
Append the next digit (1) from the dividend to 664 and continue with: 6641 / 799

Going ahead to step 6:
When dividing 6641 by 799, we get 8 with a remainder of 249.
Put 8 as the next digit of the answer. 
Result so far: 258.0
If we take 6392 away from 6641, we end up with 249.
Fetch the next digit (3) from the dividend, attach it to 249 and continue: 2493 / 799

Step 7:
2493 divided by 799 is 3 with a remainder of 96.
The number 3 becomes the next digit in our result. 
Result so far: 2583.0
The remainder is 96 after subtracting 2397 from 2493.
Fetch the next digit (3) from the dividend, attach it to 96 and continue: 963 / 799

On to step 8:
799 goes into 963 1 times with a remainder of 164.
Record the quotient 1 as the next digit in the result. 
Result so far: 25831.0
Subtracting 799 from 963 leaves us with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Step 9:
The number 799 fits into 1640 2 times, leaving a remainder of 42.
Use 2 as the next digit of our solution. 
Result so far: 25831.2
Subtracting 1598 from 1640 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 10:
420 divided by 799 is 0 with a remainder of 420.
Record the quotient 0 as the next digit in the result. 
Result so far: 25831.2
The remainder is 420 after subtracting 0 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Advancing to step 11:
799 goes into 4200 5 times with a remainder of 205.
Write down 5 as next digit of the result. 
Result so far: 25831.205
The remainder is 205 after subtracting 3995 from 4200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Step 12:
2050 divided by 799 is 2 with a remainder of 452.
Put 2 as the next digit of the answer. 
Result so far: 25831.2052
If we subtract 1598 from 2050, we get 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Advancing to step 13:
4520 divided by 799 is 5 with a remainder of 525.
Write down 5 as next digit of the result. 
Result so far: 25831.20525
The remainder is 525 after subtracting 3995 from 4520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Advancing to step 14:
When dividing 5250 by 799, we get 6 with a remainder of 456.
Write down 6 as next digit of the result. 
Result so far: 25831.205256
Deduct 4794 from 5250 and we're left with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Let's proceed to step 15:
799 can be fit into 4560 5 times, resulting in a remainder of 565.
Put 5 as the next digit of the answer. 
Result so far: 25831.2052565
Subtracting 3995 from 4560 leaves us with 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

On to step 16:
When dividing 5650 by 799, we get 7 with a remainder of 57.
Use 7 as the next digit of our solution. 
Result so far: 25831.20525657
If we take 5593 away from 5650, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The final outcome is 25831.20525657, with a leftover of 5.7e-08.