We're dividing 799861 by 21 
Our goal is to divide 799861 by 21.

Step 1:
The number 21 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 21

Moving on to step 2:
21 can be fit into 79 3 times, resulting in a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 63 from 79 leaves us with 16.
Fetch the next digit (9) from the dividend, attach it to 16 and continue: 169 / 21

Advancing to step 3:
169 divided by 21 is 8 with a remainder of 1.
The next digit of our result is 8. 
Result so far: 38.0
Subtracting 168 from 169 leaves us with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 21

Going ahead to step 4:
18 divided by 21 is 0 with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 380.0
The remainder is 18 after subtracting 0 from 18.
Fetch the next digit (6) from the dividend, attach it to 18 and continue: 186 / 21

Moving on to step 5:
21 goes into 186 8 times with a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 3808.0
Deduct 168 from 186 and we're left with 18.
Grab the next digit (1) from the dividend, add it to 18, then carry on: 181 / 21

On to step 6:
21 can be fit into 181 8 times, resulting in a remainder of 13.
Write down 8 as next digit of the result. 
Result so far: 38088.0
The remainder is 13 after subtracting 168 from 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
130 divided by 21 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 38088.6
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 8:
40 divided by 21 is 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 38088.61
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 9:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 38088.619
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 10:
If we divide 10 by 21, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 38088.619
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
21 goes into 100 4 times with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 38088.61904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 12:
When dividing 160 by 21, we get 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 38088.619047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 13:
21 goes into 130 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 38088.6190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
40 divided by 21 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 38088.61904761
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

In conclusion, the division gives 38088.61904761 with a balance of 1.9e-08.