687135 ÷ 81 
We want to figure out the number of times 687135 can be divided by 81.

Let's proceed to step 1:
81 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 81

Step 2:
81 can be fit into 68 0 times, resulting in a remainder of 68.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 68, we get 68.
Fetch the next digit (7) from the dividend, attach it to 68 and continue: 687 / 81

Let's proceed to step 3:
81 goes into 687 8 times with a remainder of 39.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 39 after subtracting 648 from 687.
Append the next digit (1) from the dividend to 39 and continue with: 391 / 81

Moving on to step 4:
81 goes into 391 4 times with a remainder of 67.
Record the quotient 4 as the next digit in the result. 
Result so far: 84.0
Deduct 324 from 391 and we're left with 67.
Grab the next digit (3) from the dividend, add it to 67, then carry on: 673 / 81

Going ahead to step 5:
If we divide 673 by 81, we get 8 and a remainder of 25.
The next digit of our result is 8. 
Result so far: 848.0
Deduct 648 from 673 and we're left with 25.
Take the next digit (5) from the dividend and append it to 25, then repeat: 255 / 81

Step 6:
255 divided by 81 is 3 with a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 8483.0
If we subtract 243 from 255, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
The number 81 fits into 120 1 times, leaving a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 8483.1
Subtracting 81 from 120 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 8:
If we divide 390 by 81, we get 4 and a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 8483.14
Deduct 324 from 390 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 9:
If we divide 660 by 81, we get 8 and a remainder of 12.
The next digit of our result is 8. 
Result so far: 8483.148
If we take 648 away from 660, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
If we divide 120 by 81, we get 1 and a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 8483.1481
Subtracting 81 from 120 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 11:
If we divide 390 by 81, we get 4 and a remainder of 66.
Use 4 as the next digit of our solution. 
Result so far: 8483.14814
If we take 324 away from 390, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 12:
81 can be fit into 660 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 8483.148148
Subtracting 648 from 660 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 13:
81 can be fit into 120 1 times, resulting in a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 8483.1481481
Deduct 81 from 120 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 14:
81 goes into 390 4 times with a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 8483.14814814
If we subtract 324 from 390, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Our division results in 8483.14814814 with a remaining 6.6e-08.