We're dividing 625751 by 21 
Let's see how many times 21 fits into 625751.

Let's proceed to step 1:
6 divided by 21 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 21

On to step 2:
When dividing 62 by 21, we get 2 with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 42 from 62 to get 20.
Bring next digit (5) of the dividend behind the 20 and repeat the process: 205 / 21

Advancing to step 3:
The number 21 fits into 205 9 times, leaving a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 29.0
Deduct 189 from 205 and we're left with 16.
Include the next digit (7) from the dividend after 16, then repeat: 167 / 21

Step 4:
The number 21 fits into 167 7 times, leaving a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 297.0
The remainder is 20 after subtracting 147 from 167.
Fetch the next digit (5) from the dividend, attach it to 20 and continue: 205 / 21

Step 5:
21 goes into 205 9 times with a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 2979.0
Subtract 189 from 205 to get 16.
Fetch the next digit (1) from the dividend, attach it to 16 and continue: 161 / 21

Moving on to step 6:
161 divided by 21 is 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 29797.0
Subtract 147 from 161 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
21 can be fit into 140 6 times, resulting in a remainder of 14.
The next digit of our result is 6. 
Result so far: 29797.6
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 8:
If we divide 140 by 21, we get 6 and a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 29797.66
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Our division results in 29797.66 with a remaining 0.014.