We look at the division of 309388 by 99 
We want to divide 309388 by 99.

Step 1:
The number 99 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 99

Moving on to step 2:
30 divided by 99 is 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 99

Step 3:
99 can be fit into 309 3 times, resulting in a remainder of 12.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 297 from 309 leaves us with 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 99

Step 4:
When dividing 123 by 99, we get 1 with a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 31.0
If we subtract 99 from 123, we get 24.
Fetch the next digit (8) from the dividend, attach it to 24 and continue: 248 / 99

Advancing to step 5:
If we divide 248 by 99, we get 2 and a remainder of 50.
The number 2 becomes the next digit in our result. 
Result so far: 312.0
If we take 198 away from 248, we end up with 50.
Grab the next digit (8) from the dividend, add it to 50, then carry on: 508 / 99

Step 6:
99 goes into 508 5 times with a remainder of 13.
Record the quotient 5 as the next digit in the result. 
Result so far: 3125.0
The remainder is 13 after subtracting 495 from 508.
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:
99 can be fit into 130 1 times, resulting in a remainder of 31.
Write down 1 as next digit of the result. 
Result so far: 3125.1
Deduct 99 from 130 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 8:
The number 99 fits into 310 3 times, leaving a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 3125.13
If we take 297 away from 310, 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.

Let's proceed to step 9:
99 can be fit into 130 1 times, resulting in a remainder of 31.
Write down 1 as next digit of the result. 
Result so far: 3125.131
If we take 99 away from 130, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 10:
If we divide 310 by 99, we get 3 and a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 3125.1313
Subtracting 297 from 310 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.

Step 11:
99 can be fit into 130 1 times, resulting in a remainder of 31.
The number 1 becomes the next digit in our result. 
Result so far: 3125.13131
The remainder is 31 after subtracting 99 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 12:
If we divide 310 by 99, we get 3 and a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 3125.131313
If we take 297 away from 310, 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.

Moving on to step 13:
130 divided by 99 is 1 with a remainder of 31.
Write down 1 as next digit of the result. 
Result so far: 3125.1313131
Deduct 99 from 130 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 14:
When dividing 310 by 99, we get 3 with a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 3125.13131313
Subtracting 297 from 310 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.

In conclusion, the division gives 3125.13131313 with a balance of 1.3e-08.