We're dividing 413551 by 81 
We want to figure out the number of times 413551 can be divided by 81.

Going ahead to step 1:
When dividing 4 by 81, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 81

On to step 2:
If we divide 41 by 81, we get 0 and a remainder of 41.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 41, we end up with 41.
Grab the next digit (3) from the dividend, add it to 41, then carry on: 413 / 81

Step 3:
When dividing 413 by 81, we get 5 with a remainder of 8.
The next digit of our result is 5. 
Result so far: 5.0
If we take 405 away from 413, we end up with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 81

Moving on to step 4:
85 divided by 81 is 1 with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 51.0
If we take 81 away from 85, we end up with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 81

Moving on to step 5:
The number 81 fits into 45 0 times, leaving a remainder of 45.
The next digit of our result is 0. 
Result so far: 510.0
If we take 0 away from 45, we end up with 45.
Fetch the next digit (1) from the dividend, attach it to 45 and continue: 451 / 81

Advancing to step 6:
81 goes into 451 5 times with a remainder of 46.
Record the quotient 5 as the next digit in the result. 
Result so far: 5105.0
Subtracting 405 from 451 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 7:
If we divide 460 by 81, we get 5 and a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 5105.5
If we take 405 away from 460, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 8:
When dividing 550 by 81, we get 6 with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 5105.56
If we take 486 away from 550, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 9:
If we divide 640 by 81, we get 7 and a remainder of 73.
Put 7 as the next digit of the answer. 
Result so far: 5105.567
If we subtract 567 from 640, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 10:
When dividing 730 by 81, we get 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 5105.5679
Subtract 729 from 730 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 11:
10 divided by 81 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 5105.5679
If we subtract 0 from 10, we 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.

Step 12:
The number 81 fits into 100 1 times, leaving a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 5105.567901
Deduct 81 from 100 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 13:
When dividing 190 by 81, we get 2 with a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 5105.5679012
Deduct 162 from 190 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 14:
280 divided by 81 is 3 with a remainder of 37.
The next digit of our result is 3. 
Result so far: 5105.56790123
If we take 243 away from 280, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

The final outcome is 5105.56790123, with a leftover of 3.7e-08.