We look at the division of 31911991 by 831 
Let's see how many times 831 fits into 31911991.

Moving on to step 1:
The number 831 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 831

Let's proceed to step 2:
831 goes into 31 0 times with a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 31, we get 31.
Append the next digit (9) from the dividend to 31 and continue with: 319 / 831

Moving on to step 3:
319 divided by 831 is 0 with a remainder of 319.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 319 and we're left with 319.
Include the next digit (1) from the dividend after 319, then repeat: 3191 / 831

Going ahead to step 4:
The number 831 fits into 3191 3 times, leaving a remainder of 698.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 2493 away from 3191, we end up with 698.
Take the next digit (1) from the dividend and append it to 698, then repeat: 6981 / 831

On to step 5:
If we divide 6981 by 831, we get 8 and a remainder of 333.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Deduct 6648 from 6981 and we're left with 333.
Take the next digit (9) from the dividend and append it to 333, then repeat: 3339 / 831

Moving on to step 6:
3339 divided by 831 is 4 with a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 384.0
The remainder is 15 after subtracting 3324 from 3339.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 831

Let's proceed to step 7:
The number 831 fits into 159 0 times, leaving a remainder of 159.
Record the quotient 0 as the next digit in the result. 
Result so far: 3840.0
If we take 0 away from 159, we end up with 159.
Grab the next digit (1) from the dividend, add it to 159, then carry on: 1591 / 831

Moving on to step 8:
1591 divided by 831 is 1 with a remainder of 760.
Put 1 as the next digit of the answer. 
Result so far: 38401.0
If we subtract 831 from 1591, we get 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Advancing to step 9:
When dividing 7600 by 831, we get 9 with a remainder of 121.
Use 9 as the next digit of our solution. 
Result so far: 38401.9
If we subtract 7479 from 7600, we get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

On to step 10:
When dividing 1210 by 831, we get 1 with a remainder of 379.
Put 1 as the next digit of the answer. 
Result so far: 38401.91
Subtracting 831 from 1210 leaves us with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Advancing to step 11:
If we divide 3790 by 831, we get 4 and a remainder of 466.
The next digit of our result is 4. 
Result so far: 38401.914
The remainder is 466 after subtracting 3324 from 3790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

On to step 12:
831 goes into 4660 5 times with a remainder of 505.
The number 5 becomes the next digit in our result. 
Result so far: 38401.9145
Deduct 4155 from 4660 and we're left with 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Let's proceed to step 13:
831 goes into 5050 6 times with a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 38401.91456
If we take 4986 away from 5050, we end up 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.

Advancing to step 14:
If we divide 640 by 831, we get 0 and a remainder of 640.
The number 0 becomes the next digit in our result. 
Result so far: 38401.91456
Subtracting 0 from 640 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Let's proceed to step 15:
6400 divided by 831 is 7 with a remainder of 583.
Put 7 as the next digit of the answer. 
Result so far: 38401.9145607
If we take 5817 away from 6400, we end up with 583.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

Step 16:
When dividing 5830 by 831, we get 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 38401.91456077
Subtracting 5817 from 5830 leaves us 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.

The final result is 38401.91456077 with a remainder of 1.3e-08.