553639 divided by 81 
We're looking to find how many times 81 goes into 553639.

Going ahead to step 1:
If we divide 5 by 81, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 81

Advancing to step 2:
55 divided by 81 is 0 with a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Append the next digit (3) from the dividend to 55 and continue with: 553 / 81

On to step 3:
When dividing 553 by 81, we get 6 with a remainder of 67.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 486 from 553 to get 67.
Include the next digit (6) from the dividend after 67, then repeat: 676 / 81

Advancing to step 4:
81 goes into 676 8 times with a remainder of 28.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Deduct 648 from 676 and we're left with 28.
Take the next digit (3) from the dividend and append it to 28, then repeat: 283 / 81

Advancing to step 5:
The number 81 fits into 283 3 times, leaving a remainder of 40.
Put 3 as the next digit of the answer. 
Result so far: 683.0
Deduct 243 from 283 and we're left with 40.
Include the next digit (9) from the dividend after 40, then repeat: 409 / 81

Advancing to step 6:
When dividing 409 by 81, we get 5 with a remainder of 4.
The number 5 becomes the next digit in our result. 
Result so far: 6835.0
Subtract 405 from 409 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
81 goes into 40 0 times with a remainder of 40.
The next digit of our result is 0. 
Result so far: 6835.0
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
When dividing 400 by 81, we get 4 with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 6835.04
The remainder is 76 after subtracting 324 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 9:
When dividing 760 by 81, we get 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 6835.049
Deduct 729 from 760 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 10:
310 divided by 81 is 3 with a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 6835.0493
The remainder is 67 after subtracting 243 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 11:
81 goes into 670 8 times with a remainder of 22.
Write down 8 as next digit of the result. 
Result so far: 6835.04938
Subtracting 648 from 670 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 12:
81 can be fit into 220 2 times, resulting in a remainder of 58.
Write down 2 as next digit of the result. 
Result so far: 6835.049382
Subtract 162 from 220 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 13:
580 divided by 81 is 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 6835.0493827
If we take 567 away from 580, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 14:
The number 81 fits into 130 1 times, leaving a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 6835.04938271
If we subtract 81 from 130, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

The final result is 6835.04938271 with a remainder of 4.9e-08.