We look at the division of 450307 by 18 
We want to divide 450307 by 18.

Step 1:
The number 18 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 18

Step 2:
When dividing 45 by 18, we get 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 36 from 45 to get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 18

Going ahead to step 3:
If we divide 90 by 18, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 25.0
If we subtract 90 from 90, we get 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 18

Moving on to step 4:
If we divide 3 by 18, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 250.0
If we take 0 away from 3, we end up with 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 18

Moving on to step 5:
18 can be fit into 30 1 times, resulting in a remainder of 12.
The next digit of our result is 1. 
Result so far: 2501.0
The remainder is 12 after subtracting 18 from 30.
Take the next digit (7) from the dividend and append it to 12, then repeat: 127 / 18

Going ahead to step 6:
The number 18 fits into 127 7 times, leaving a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 25017.0
If we take 126 away from 127, we end up 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:
18 goes into 10 0 times with a remainder of 10.
The next digit of our result is 0. 
Result so far: 25017.0
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 8:
If we divide 100 by 18, we get 5 and a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 25017.05
Deduct 90 from 100 and we're left 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.

Advancing to step 9:
18 can be fit into 100 5 times, resulting in a remainder of 10.
The next digit of our result is 5. 
Result so far: 25017.055
Deduct 90 from 100 and we're left 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.

Our division results in 25017.055 with a remaining 0.001.