We look at the division of 81351858 by 454 
We're looking to find how many times 454 goes into 81351858.

On to step 1:
The number 454 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 454

Going ahead to step 2:
81 divided by 454 is 0 with a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Append the next digit (3) from the dividend to 81 and continue with: 813 / 454

On to step 3:
813 divided by 454 is 1 with a remainder of 359.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 359 after subtracting 454 from 813.
Take the next digit (5) from the dividend and append it to 359, then repeat: 3595 / 454

Moving on to step 4:
3595 divided by 454 is 7 with a remainder of 417.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Subtracting 3178 from 3595 leaves us with 417.
Grab the next digit (1) from the dividend, add it to 417, then carry on: 4171 / 454

Step 5:
If we divide 4171 by 454, we get 9 and a remainder of 85.
Put 9 as the next digit of the answer. 
Result so far: 179.0
Deduct 4086 from 4171 and we're left with 85.
Take the next digit (8) from the dividend and append it to 85, then repeat: 858 / 454

On to step 6:
If we divide 858 by 454, we get 1 and a remainder of 404.
Write down 1 as next digit of the result. 
Result so far: 1791.0
Deduct 454 from 858 and we're left with 404.
Take the next digit (5) from the dividend and append it to 404, then repeat: 4045 / 454

Let's proceed to step 7:
When dividing 4045 by 454, we get 8 with a remainder of 413.
Record the quotient 8 as the next digit in the result. 
Result so far: 17918.0
Subtracting 3632 from 4045 leaves us with 413.
Include the next digit (8) from the dividend after 413, then repeat: 4138 / 454

Step 8:
If we divide 4138 by 454, we get 9 and a remainder of 52.
The number 9 becomes the next digit in our result. 
Result so far: 179189.0
If we take 4086 away from 4138, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 9:
When dividing 520 by 454, we get 1 with a remainder of 66.
Write down 1 as next digit of the result. 
Result so far: 179189.1
Subtracting 454 from 520 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 10:
The number 454 fits into 660 1 times, leaving a remainder of 206.
Put 1 as the next digit of the answer. 
Result so far: 179189.11
Deduct 454 from 660 and we're left with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

The final outcome is 179189.11, with a leftover of 0.206.