We're dividing 172290 by 81 
We want to divide 172290 by 81.

On to step 1:
When dividing 1 by 81, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 81

Going ahead to step 2:
81 can be fit into 17 0 times, resulting in a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 81

Let's proceed to step 3:
The number 81 fits into 172 2 times, leaving a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 162 from 172, we get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 81

Going ahead to step 4:
When dividing 102 by 81, we get 1 with a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 21.0
If we take 81 away from 102, we end up with 21.
Take the next digit (9) from the dividend and append it to 21, then repeat: 219 / 81

Let's proceed to step 5:
81 goes into 219 2 times with a remainder of 57.
The next digit of our result is 2. 
Result so far: 212.0
The remainder is 57 after subtracting 162 from 219.
Fetch the next digit (0) from the dividend, attach it to 57 and continue: 570 / 81

Step 6:
81 can be fit into 570 7 times, resulting in a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 2127.0
If we subtract 567 from 570, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
30 divided by 81 is 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 2127.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
300 divided by 81 is 3 with a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 2127.03
Deduct 243 from 300 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 9:
If we divide 570 by 81, we get 7 and a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 2127.037
If we subtract 567 from 570, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 10:
81 goes into 30 0 times with a remainder of 30.
The next digit of our result is 0. 
Result so far: 2127.037
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 11:
300 divided by 81 is 3 with a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 2127.03703
Deduct 243 from 300 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 12:
81 can be fit into 570 7 times, resulting in a remainder of 3.
The next digit of our result is 7. 
Result so far: 2127.037037
Subtract 567 from 570 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 13:
The number 81 fits into 30 0 times, leaving a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 2127.037037
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 14:
If we divide 300 by 81, we get 3 and a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 2127.03703703
If we take 243 away from 300, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The quotient of the division is 2127.03703703, and the remainder is 5.7e-08.