We divide 511871 by 81
We want to figure out the number of times 511871 can be divided by 81.

Advancing to step 1:
81 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 81

On to step 2:
The number 81 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Bring next digit (1) of the dividend behind the 51 and repeat the process: 511 / 81

Step 3:
511 divided by 81 is 6 with a remainder of 25.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Deduct 486 from 511 and we're left with 25.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 81

Advancing to step 4:
81 can be fit into 258 3 times, resulting in a remainder of 15.
The next digit of our result is 3. 
Result so far: 63.0
The remainder is 15 after subtracting 243 from 258.
Bring next digit (7) of the dividend behind the 15 and repeat the process: 157 / 81

Going ahead to step 5:
The number 81 fits into 157 1 times, leaving a remainder of 76.
Put 1 as the next digit of the answer. 
Result so far: 631.0
If we take 81 away from 157, we end up with 76.
Take the next digit (1) from the dividend and append it to 76, then repeat: 761 / 81

On to step 6:
When dividing 761 by 81, we get 9 with a remainder of 32.
Record the quotient 9 as the next digit in the result. 
Result so far: 6319.0
The remainder is 32 after subtracting 729 from 761.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 7:
If we divide 320 by 81, we get 3 and a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 6319.3
Subtract 243 from 320 to get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 8:
770 divided by 81 is 9 with a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 6319.39
The remainder is 41 after subtracting 729 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 9:
When dividing 410 by 81, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 6319.395
If we take 405 away from 410, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 10:
If we divide 50 by 81, we get 0 and a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 6319.395
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 11:
81 can be fit into 500 6 times, resulting in a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 6319.39506
The remainder is 14 after subtracting 486 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 12:
If we divide 140 by 81, we get 1 and a remainder of 59.
Put 1 as the next digit of the answer. 
Result so far: 6319.395061
If we take 81 away from 140, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 13:
81 goes into 590 7 times with a remainder of 23.
The next digit of our result is 7. 
Result so far: 6319.3950617
If we subtract 567 from 590, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 14:
81 goes into 230 2 times with a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 6319.39506172
If we subtract 162 from 230, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

The quotient of the division is 6319.39506172, and the remainder is 6.8e-08.