We look at the division of 864451 by 5 
We want to divide 864451 by 5.

Moving on to step 1:
When dividing 8 by 5, we get 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 3 after subtracting 5 from 8.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 5

Let's proceed to step 2:
The number 5 fits into 36 7 times, leaving a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we subtract 35 from 36, we get 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 5

Let's proceed to step 3:
14 divided by 5 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 172.0
If we take 10 away from 14, we end up with 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 5

Step 4:
44 divided by 5 is 8 with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 1728.0
Deduct 40 from 44 and we're left with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 5

On to step 5:
5 can be fit into 45 9 times, resulting in a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 17289.0
Deduct 45 from 45 and we're left with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 5

Let's proceed to step 6:
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: 172890.0
Subtracting 0 from 1 leaves us 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.

Advancing to step 7:
The number 5 fits into 10 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 172890.2
If we subtract 10 from 10, 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.

Moving on to step 8:
5 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 172890.2
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.

Going ahead to step 9:
5 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 172890.2
Subtracting 0 from 0 leaves us 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.

The final outcome is 172890.2, with a leftover of 0.0.