We're dividing 81591982 by 31 
We're looking to find how many times 31 goes into 81591982.

Step 1:
31 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 31

Step 2:
When dividing 81 by 31, we get 2 with a remainder of 19.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 62 from 81 and we're left with 19.
Include the next digit (5) from the dividend after 19, then repeat: 195 / 31

Advancing to step 3:
195 divided by 31 is 6 with a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 26.0
If we subtract 186 from 195, we get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 31

Going ahead to step 4:
99 divided by 31 is 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 263.0
If we subtract 93 from 99, we get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 31

Going ahead to step 5:
31 goes into 61 1 times with a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 2631.0
The remainder is 30 after subtracting 31 from 61.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 31

On to step 6:
If we divide 309 by 31, we get 9 and a remainder of 30.
The number 9 becomes the next digit in our result. 
Result so far: 26319.0
Subtracting 279 from 309 leaves us with 30.
Bring next digit (8) of the dividend behind the 30 and repeat the process: 308 / 31

Let's proceed to step 7:
When dividing 308 by 31, we get 9 with a remainder of 29.
Record the quotient 9 as the next digit in the result. 
Result so far: 263199.0
Subtract 279 from 308 to get 29.
Bring next digit (2) of the dividend behind the 29 and repeat the process: 292 / 31

Advancing to step 8:
The number 31 fits into 292 9 times, leaving a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 2631999.0
If we take 279 away from 292, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 9:
If we divide 130 by 31, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 2631999.4
Subtracting 124 from 130 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 10:
When dividing 60 by 31, we get 1 with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 2631999.41
Deduct 31 from 60 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 11:
When dividing 290 by 31, we get 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 2631999.419
The remainder is 11 after subtracting 279 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 12:
If we divide 110 by 31, we get 3 and a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 2631999.4193
If we subtract 93 from 110, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 13:
If we divide 170 by 31, we get 5 and a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 2631999.41935
If we take 155 away from 170, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 14:
31 goes into 150 4 times with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 2631999.419354
The remainder is 26 after subtracting 124 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 15:
31 can be fit into 260 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 2631999.4193548
Subtract 248 from 260 to 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.

On to step 16:
31 goes into 120 3 times with a remainder of 27.
The next digit of our result is 3. 
Result so far: 2631999.41935483
The remainder is 27 after subtracting 93 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

The final outcome is 2631999.41935483, with a leftover of 2.7e-08.