172686 ÷ 81 
We want to divide 172686 by 81.

On to step 1:
1 divided by 81 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 81

Advancing to step 2:
If we divide 17 by 81, we get 0 and a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Take the next digit (2) from the dividend and append it to 17, then repeat: 172 / 81

Moving on to step 3:
81 goes into 172 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 162 from 172 leaves us with 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 81

Let's proceed to step 4:
81 goes into 106 1 times with a remainder of 25.
Use 1 as the next digit of our solution. 
Result so far: 21.0
The remainder is 25 after subtracting 81 from 106.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 81

Advancing to step 5:
The number 81 fits into 258 3 times, leaving a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 213.0
The remainder is 15 after subtracting 243 from 258.
Bring next digit (6) of the dividend behind the 15 and repeat the process: 156 / 81

Moving on to step 6:
81 can be fit into 156 1 times, resulting in a remainder of 75.
Put 1 as the next digit of the answer. 
Result so far: 2131.0
Subtracting 81 from 156 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 7:
When dividing 750 by 81, we get 9 with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 2131.9
If we take 729 away from 750, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 8:
If we divide 210 by 81, we get 2 and a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 2131.92
The remainder is 48 after subtracting 162 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 9:
81 goes into 480 5 times with a remainder of 75.
The next digit of our result is 5. 
Result so far: 2131.925
The remainder is 75 after subtracting 405 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 10:
81 goes into 750 9 times with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 2131.9259
Subtracting 729 from 750 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 11:
210 divided by 81 is 2 with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 2131.92592
The remainder is 48 after subtracting 162 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 12:
When dividing 480 by 81, we get 5 with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 2131.925925
If we subtract 405 from 480, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 13:
When dividing 750 by 81, we get 9 with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 2131.9259259
If we take 729 away from 750, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 14:
When dividing 210 by 81, we get 2 with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 2131.92592592
Subtract 162 from 210 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The quotient of the division is 2131.92592592, and the remainder is 4.8e-08.