We divide 451234 by 18
We want to divide 451234 by 18.

Advancing to step 1:
4 divided by 18 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 18

Moving on to step 2:
18 goes into 45 2 times with a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 36 from 45, we get 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 18

Advancing to step 3:
The number 18 fits into 91 5 times, leaving a remainder of 1.
The next digit of our result is 5. 
Result so far: 25.0
Deduct 90 from 91 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 18

On to step 4:
The number 18 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 250.0
If we take 0 away from 12, we end up with 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 18

On to step 5:
The number 18 fits into 123 6 times, leaving a remainder of 15.
The number 6 becomes the next digit in our result. 
Result so far: 2506.0
Subtract 108 from 123 to get 15.
Append the next digit (4) from the dividend to 15 and continue with: 154 / 18

Step 6:
18 can be fit into 154 8 times, resulting in a remainder of 10.
The next digit of our result is 8. 
Result so far: 25068.0
Subtract 144 from 154 to get 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 7:
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: 25068.5
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
18 goes into 100 5 times with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 25068.55
If we take 90 away from 100, we end up 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.

The final outcome is 25068.55, with a leftover of 0.01.