We're dividing 451391 by 18 
Let's see how many times 18 fits into 451391.

Advancing to step 1:
When dividing 4 by 18, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
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 / 18

Going ahead to step 2:
45 divided by 18 is 2 with a remainder of 9.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 9 after subtracting 36 from 45.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 18

Moving on to step 3:
18 goes into 91 5 times with a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtract 90 from 91 to get 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 18

Going ahead to step 4:
18 goes into 13 0 times with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 250.0
If we subtract 0 from 13, we get 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 18

Going ahead to step 5:
If we divide 139 by 18, we get 7 and a remainder of 13.
The next digit of our result is 7. 
Result so far: 2507.0
Subtract 126 from 139 to get 13.
Append the next digit (1) from the dividend to 13 and continue with: 131 / 18

Step 6:
131 divided by 18 is 7 with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 25077.0
Subtracting 126 from 131 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 7:
When dividing 50 by 18, we get 2 with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 25077.2
If we take 36 away from 50, we end up 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.

On to step 8:
18 goes into 140 7 times with a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 25077.27
If we subtract 126 from 140, we 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 9:
18 goes into 140 7 times with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 25077.277
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 25077.277 with a remaining 0.0014.