55191806 ÷ 81 
We want to divide 55191806 by 81.

Moving on to step 1:
81 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 81

Moving on to step 2:
When dividing 55 by 81, we get 0 with a remainder of 55.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 55 after subtracting 0 from 55.
Bring next digit (1) of the dividend behind the 55 and repeat the process: 551 / 81

On to step 3:
551 divided by 81 is 6 with a remainder of 65.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 65 after subtracting 486 from 551.
Include the next digit (9) from the dividend after 65, then repeat: 659 / 81

On to step 4:
81 can be fit into 659 8 times, resulting in a remainder of 11.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
The remainder is 11 after subtracting 648 from 659.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 81

Let's proceed to step 5:
111 divided by 81 is 1 with a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 681.0
If we take 81 away from 111, we end up with 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 81

Advancing to step 6:
When dividing 308 by 81, we get 3 with a remainder of 65.
Write down 3 as next digit of the result. 
Result so far: 6813.0
Subtracting 243 from 308 leaves us with 65.
Append the next digit (0) from the dividend to 65 and continue with: 650 / 81

Step 7:
650 divided by 81 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 68138.0
Subtract 648 from 650 to get 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 81

On to step 8:
81 goes into 26 0 times with a remainder of 26.
The number 0 becomes the next digit in our result. 
Result so far: 681380.0
Deduct 0 from 26 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 9:
260 divided by 81 is 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 681380.3
Deduct 243 from 260 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 10:
When dividing 170 by 81, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 681380.32
Subtracting 162 from 170 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 11:
80 divided by 81 is 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 681380.32
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 12:
If we divide 800 by 81, we get 9 and a remainder of 71.
The number 9 becomes the next digit in our result. 
Result so far: 681380.3209
Subtracting 729 from 800 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 13:
81 can be fit into 710 8 times, resulting in a remainder of 62.
The next digit of our result is 8. 
Result so far: 681380.32098
Deduct 648 from 710 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 14:
81 can be fit into 620 7 times, resulting in a remainder of 53.
The number 7 becomes the next digit in our result. 
Result so far: 681380.320987
Subtracting 567 from 620 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 15:
81 goes into 530 6 times with a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 681380.3209876
Subtract 486 from 530 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 16:
81 goes into 440 5 times with a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 681380.32098765
The remainder is 35 after subtracting 405 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final result is 681380.32098765 with a remainder of 3.5e-08.