We look at the division of 391419 by 31 
We want to figure out the number of times 391419 can be divided by 31.

Going ahead to step 1:
If we divide 3 by 31, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 31

On to step 2:
39 divided by 31 is 1 with a remainder of 8.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 31 from 39 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 31

Advancing to step 3:
81 divided by 31 is 2 with a remainder of 19.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 62 from 81 to get 19.
Fetch the next digit (4) from the dividend, attach it to 19 and continue: 194 / 31

Advancing to step 4:
194 divided by 31 is 6 with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 126.0
If we take 186 away from 194, we end up with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 31

Let's proceed to step 5:
31 can be fit into 81 2 times, resulting in a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 1262.0
Subtracting 62 from 81 leaves us with 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 31

On to step 6:
31 goes into 199 6 times with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 12626.0
Subtract 186 from 199 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
The number 31 fits into 130 4 times, leaving a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 12626.4
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.

Let's proceed to step 8:
31 can be fit into 60 1 times, resulting in a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 12626.41
Subtract 31 from 60 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 9:
The number 31 fits into 290 9 times, leaving a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 12626.419
Deduct 279 from 290 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 10:
31 can be fit into 110 3 times, resulting in a remainder of 17.
The next digit of our result is 3. 
Result so far: 12626.4193
If we take 93 away from 110, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 11:
31 goes into 170 5 times with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 12626.41935
Deduct 155 from 170 and we're left 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.

Moving on to step 12:
The number 31 fits into 150 4 times, leaving a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 12626.419354
Subtracting 124 from 150 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 13:
31 goes into 260 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 12626.4193548
Subtracting 248 from 260 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 14:
31 goes into 120 3 times with a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 12626.41935483
If we take 93 away from 120, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Our division results in 12626.41935483 with a remaining 2.7e-08.