577853 ÷ 81 
Let's see how many times 81 fits into 577853.

Step 1:
The number 81 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 81

Let's proceed to step 2:
57 divided by 81 is 0 with a remainder of 57.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Bring next digit (7) of the dividend behind the 57 and repeat the process: 577 / 81

Moving on to step 3:
81 can be fit into 577 7 times, resulting in a remainder of 10.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 10 after subtracting 567 from 577.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 81

On to step 4:
81 goes into 108 1 times with a remainder of 27.
Use 1 as the next digit of our solution. 
Result so far: 71.0
The remainder is 27 after subtracting 81 from 108.
Take the next digit (5) from the dividend and append it to 27, then repeat: 275 / 81

On to step 5:
If we divide 275 by 81, we get 3 and a remainder of 32.
Write down 3 as next digit of the result. 
Result so far: 713.0
Subtracting 243 from 275 leaves us with 32.
Append the next digit (3) from the dividend to 32 and continue with: 323 / 81

Moving on to step 6:
81 can be fit into 323 3 times, resulting in a remainder of 80.
The next digit of our result is 3. 
Result so far: 7133.0
If we subtract 243 from 323, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 7:
81 can be fit into 800 9 times, resulting in a remainder of 71.
Write down 9 as next digit of the result. 
Result so far: 7133.9
Deduct 729 from 800 and we're left 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 8:
If we divide 710 by 81, we get 8 and a remainder of 62.
The next digit of our result is 8. 
Result so far: 7133.98
If we subtract 648 from 710, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 9:
If we divide 620 by 81, we get 7 and a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 7133.987
The remainder is 53 after subtracting 567 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

On to step 10:
81 goes into 530 6 times with a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 7133.9876
If we subtract 486 from 530, we 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 11:
81 can be fit into 440 5 times, resulting in a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 7133.98765
If we subtract 405 from 440, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 12:
The number 81 fits into 350 4 times, leaving a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 7133.987654
The remainder is 26 after subtracting 324 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 13:
260 divided by 81 is 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 7133.9876543
Subtracting 243 from 260 leaves us 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.

Advancing to step 14:
The number 81 fits into 170 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 7133.98765432
The remainder is 8 after subtracting 162 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 7133.98765432, with a leftover of 8e-09.