We look at the division of 86081451 by 90 
We want to divide 86081451 by 90.

Step 1:
8 divided by 90 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 90

Step 2:
If we divide 86 by 90, we get 0 and a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Include the next digit (0) from the dividend after 86, then repeat: 860 / 90

Advancing to step 3:
90 can be fit into 860 9 times, resulting in a remainder of 50.
The next digit of our result is 9. 
Result so far: 9.0
If we take 810 away from 860, we end up with 50.
Take the next digit (8) from the dividend and append it to 50, then repeat: 508 / 90

Going ahead to step 4:
If we divide 508 by 90, we get 5 and a remainder of 58.
Put 5 as the next digit of the answer. 
Result so far: 95.0
If we subtract 450 from 508, we get 58.
Append the next digit (1) from the dividend to 58 and continue with: 581 / 90

Let's proceed to step 5:
If we divide 581 by 90, we get 6 and a remainder of 41.
Put 6 as the next digit of the answer. 
Result so far: 956.0
If we subtract 540 from 581, we get 41.
Fetch the next digit (4) from the dividend, attach it to 41 and continue: 414 / 90

Step 6:
90 goes into 414 4 times with a remainder of 54.
Write down 4 as next digit of the result. 
Result so far: 9564.0
If we subtract 360 from 414, we get 54.
Grab the next digit (5) from the dividend, add it to 54, then carry on: 545 / 90

Going ahead to step 7:
90 can be fit into 545 6 times, resulting in a remainder of 5.
The next digit of our result is 6. 
Result so far: 95646.0
Deduct 540 from 545 and we're left with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 90

Advancing to step 8:
90 goes into 51 0 times with a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 956460.0
Subtract 0 from 51 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 9:
The number 90 fits into 510 5 times, leaving a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 956460.5
Subtracting 450 from 510 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 10:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 956460.56
Deduct 540 from 600 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 11:
When dividing 600 by 90, we get 6 with a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 956460.566
If we take 540 away from 600, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 956460.566 and a remainder of 0.006.