622858 ÷ 21 
Our goal is to divide 622858 by 21.

Step 1:
If we divide 6 by 21, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 21

On to step 2:
When dividing 62 by 21, we get 2 with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 42 from 62, we get 20.
Grab the next digit (2) from the dividend, add it to 20, then carry on: 202 / 21

Moving on to step 3:
If we divide 202 by 21, we get 9 and a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
If we subtract 189 from 202, we get 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 21

Moving on to step 4:
21 goes into 138 6 times with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 296.0
If we subtract 126 from 138, we get 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 21

Moving on to step 5:
The number 21 fits into 125 5 times, leaving a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 2965.0
Subtract 105 from 125 to get 20.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 21

Advancing to step 6:
If we divide 208 by 21, we get 9 and a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 29659.0
The remainder is 19 after subtracting 189 from 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
The number 21 fits into 190 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 29659.9
The remainder is 1 after subtracting 189 from 190.
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 8:
21 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 29659.9
Subtracting 0 from 10 leaves us 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.

Let's proceed to step 9:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 29659.904
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.

Going ahead to step 10:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 29659.9047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 11:
If we divide 130 by 21, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 29659.90476
Subtracting 126 from 130 leaves us 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.

On to step 12:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 29659.904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 13:
21 goes into 190 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 29659.9047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 14:
10 divided by 21 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 29659.9047619
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 29659.9047619 with a balance of 1e-08.