261820 ÷ 81 
We're looking to find how many times 81 goes into 261820.

On to step 1:
2 divided by 81 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 81

Moving on to step 2:
If we divide 26 by 81, we get 0 and a remainder of 26.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 26 after subtracting 0 from 26.
Include the next digit (1) from the dividend after 26, then repeat: 261 / 81

On to step 3:
When dividing 261 by 81, we get 3 with a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 243 away from 261, we end up with 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 81

On to step 4:
81 can be fit into 188 2 times, resulting in a remainder of 26.
Use 2 as the next digit of our solution. 
Result so far: 32.0
Subtract 162 from 188 to get 26.
Include the next digit (2) from the dividend after 26, then repeat: 262 / 81

On to step 5:
If we divide 262 by 81, we get 3 and a remainder of 19.
Use 3 as the next digit of our solution. 
Result so far: 323.0
Subtract 243 from 262 to get 19.
Append the next digit (0) from the dividend to 19 and continue with: 190 / 81

Moving on to step 6:
81 can be fit into 190 2 times, resulting in a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 3232.0
If we take 162 away from 190, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 7:
When dividing 280 by 81, we get 3 with a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 3232.3
Subtract 243 from 280 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Advancing to step 8:
81 goes into 370 4 times with a remainder of 46.
Put 4 as the next digit of the answer. 
Result so far: 3232.34
If we take 324 away from 370, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 9:
81 can be fit into 460 5 times, resulting in a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 3232.345
The remainder is 55 after subtracting 405 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 10:
When dividing 550 by 81, we get 6 with a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 3232.3456
Deduct 486 from 550 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 11:
640 divided by 81 is 7 with a remainder of 73.
Write down 7 as next digit of the result. 
Result so far: 3232.34567
The remainder is 73 after subtracting 567 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 12:
The number 81 fits into 730 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 3232.345679
The remainder is 1 after subtracting 729 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 13:
When dividing 10 by 81, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 3232.345679
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 14:
100 divided by 81 is 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 3232.34567901
Subtracting 81 from 100 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Our division results in 3232.34567901 with a remaining 1.9e-08.