We're dividing 81171344 by 231 
We want to divide 81171344 by 231.

Step 1:
If we divide 8 by 231, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 231

Going ahead to step 2:
81 divided by 231 is 0 with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Include the next digit (1) from the dividend after 81, then repeat: 811 / 231

Let's proceed to step 3:
When dividing 811 by 231, we get 3 with a remainder of 118.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 693 from 811 leaves us with 118.
Append the next digit (7) from the dividend to 118 and continue with: 1187 / 231

On to step 4:
231 goes into 1187 5 times with a remainder of 32.
Use 5 as the next digit of our solution. 
Result so far: 35.0
Subtracting 1155 from 1187 leaves us with 32.
Fetch the next digit (1) from the dividend, attach it to 32 and continue: 321 / 231

Let's proceed to step 5:
When dividing 321 by 231, we get 1 with a remainder of 90.
Use 1 as the next digit of our solution. 
Result so far: 351.0
The remainder is 90 after subtracting 231 from 321.
Fetch the next digit (3) from the dividend, attach it to 90 and continue: 903 / 231

Step 6:
When dividing 903 by 231, we get 3 with a remainder of 210.
Record the quotient 3 as the next digit in the result. 
Result so far: 3513.0
The remainder is 210 after subtracting 693 from 903.
Append the next digit (4) from the dividend to 210 and continue with: 2104 / 231

Let's proceed to step 7:
231 can be fit into 2104 9 times, resulting in a remainder of 25.
The next digit of our result is 9. 
Result so far: 35139.0
Deduct 2079 from 2104 and we're left with 25.
Grab the next digit (4) from the dividend, add it to 25, then carry on: 254 / 231

Advancing to step 8:
231 can be fit into 254 1 times, resulting in a remainder of 23.
Record the quotient 1 as the next digit in the result. 
Result so far: 351391.0
If we take 231 away from 254, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 9:
The number 231 fits into 230 0 times, leaving a remainder of 230.
The number 0 becomes the next digit in our result. 
Result so far: 351391.0
Deduct 0 from 230 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

On to step 10:
The number 231 fits into 2300 9 times, leaving a remainder of 221.
Record the quotient 9 as the next digit in the result. 
Result so far: 351391.09
If we subtract 2079 from 2300, we get 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Advancing to step 11:
When dividing 2210 by 231, we get 9 with a remainder of 131.
Use 9 as the next digit of our solution. 
Result so far: 351391.099
Deduct 2079 from 2210 and we're left with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

After the division, we end up with 351391.099 and a remainder of 0.0131.