451721 ÷ 5 
Our goal is to divide 451721 by 5.

On to step 1:
5 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 5

On to step 2:
When dividing 45 by 5, we get 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 9.0
If we take 45 away from 45, we end up with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 5

Going ahead to step 3:
1 divided by 5 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 5

Let's proceed to step 4:
If we divide 17 by 5, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 903.0
If we subtract 15 from 17, we get 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 5

Going ahead to step 5:
5 goes into 22 4 times with a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 9034.0
Subtract 20 from 22 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 5

Going ahead to step 6:
When dividing 21 by 5, we get 4 with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 90344.0
Deduct 20 from 21 and we're left 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 7:
When dividing 10 by 5, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 90344.2
The remainder is 0 after subtracting 10 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
The number 5 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 90344.2
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
When dividing 0 by 5, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 90344.2
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 90344.2 with a remainder of 0.0.