Let's divide 451325 by 21
We're looking to find how many times 21 goes into 451325.

Advancing to step 1:
21 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 21

Advancing to step 2:
45 divided by 21 is 2 with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 42 from 45, we get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 21

Moving on to step 3:
When dividing 31 by 21, we get 1 with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 21.0
The remainder is 10 after subtracting 21 from 31.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 21

Let's proceed to step 4:
If we divide 103 by 21, we get 4 and a remainder of 19.
Record the quotient 4 as the next digit in the result. 
Result so far: 214.0
Subtracting 84 from 103 leaves us with 19.
Append the next digit (2) from the dividend to 19 and continue with: 192 / 21

Going ahead to step 5:
21 can be fit into 192 9 times, resulting in a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 2149.0
If we subtract 189 from 192, we get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 21

Moving on to step 6:
If we divide 35 by 21, we get 1 and a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 21491.0
Subtract 21 from 35 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.

Going ahead to step 7:
21 goes into 140 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 21491.6
Subtracting 126 from 140 leaves us with 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 8:
The number 21 fits into 140 6 times, leaving a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 21491.66
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.

After the division, we end up with 21491.66 and a remainder of 0.014.