We look at the division of 307439 by 31 
Our goal is to divide 307439 by 31.

Let's proceed to step 1:
31 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 31

Let's proceed to step 2:
31 goes into 30 0 times with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Fetch the next digit (7) from the dividend, attach it to 30 and continue: 307 / 31

On to step 3:
307 divided by 31 is 9 with a remainder of 28.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 279 from 307 leaves us with 28.
Fetch the next digit (4) from the dividend, attach it to 28 and continue: 284 / 31

Step 4:
31 goes into 284 9 times with a remainder of 5.
Use 9 as the next digit of our solution. 
Result so far: 99.0
Deduct 279 from 284 and we're left with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 31

Step 5:
31 goes into 53 1 times with a remainder of 22.
The next digit of our result is 1. 
Result so far: 991.0
Subtracting 31 from 53 leaves us with 22.
Append the next digit (9) from the dividend to 22 and continue with: 229 / 31

Let's proceed to step 6:
When dividing 229 by 31, we get 7 with a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 9917.0
Deduct 217 from 229 and we're left 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.

Advancing to step 7:
31 can be fit into 120 3 times, resulting in a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 9917.3
If we subtract 93 from 120, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 8:
31 goes into 270 8 times with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 9917.38
Subtract 248 from 270 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 9:
220 divided by 31 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 9917.387
The remainder is 3 after subtracting 217 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 10:
When dividing 30 by 31, we get 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 9917.387
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
300 divided by 31 is 9 with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 9917.38709
If we take 279 away from 300, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 12:
31 can be fit into 210 6 times, resulting in a remainder of 24.
The next digit of our result is 6. 
Result so far: 9917.387096
Deduct 186 from 210 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 13:
31 goes into 240 7 times with a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 9917.3870967
The remainder is 23 after subtracting 217 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 14:
31 can be fit into 230 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 9917.38709677
If we take 217 away from 230, 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.

After the division, we end up with 9917.38709677 and a remainder of 1.3e-08.