12385839 ÷ 397 
Let's see how many times 397 fits into 12385839.

Step 1:
If we divide 1 by 397, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 397

Moving on to step 2:
When dividing 12 by 397, we get 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 397

Let's proceed to step 3:
123 divided by 397 is 0 with a remainder of 123.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 123, we get 123.
Take the next digit (8) from the dividend and append it to 123, then repeat: 1238 / 397

Advancing to step 4:
When dividing 1238 by 397, we get 3 with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 1191 from 1238 leaves us with 47.
Include the next digit (5) from the dividend after 47, then repeat: 475 / 397

Let's proceed to step 5:
397 goes into 475 1 times with a remainder of 78.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
If we subtract 397 from 475, we get 78.
Include the next digit (8) from the dividend after 78, then repeat: 788 / 397

Going ahead to step 6:
The number 397 fits into 788 1 times, leaving a remainder of 391.
Write down 1 as next digit of the result. 
Result so far: 311.0
Subtract 397 from 788 to get 391.
Take the next digit (3) from the dividend and append it to 391, then repeat: 3913 / 397

Advancing to step 7:
397 goes into 3913 9 times with a remainder of 340.
The next digit of our result is 9. 
Result so far: 3119.0
Subtract 3573 from 3913 to get 340.
Take the next digit (9) from the dividend and append it to 340, then repeat: 3409 / 397

Let's proceed to step 8:
397 can be fit into 3409 8 times, resulting in a remainder of 233.
Record the quotient 8 as the next digit in the result. 
Result so far: 31198.0
The remainder is 233 after subtracting 3176 from 3409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Step 9:
397 goes into 2330 5 times with a remainder of 345.
The next digit of our result is 5. 
Result so far: 31198.5
The remainder is 345 after subtracting 1985 from 2330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Advancing to step 10:
If we divide 3450 by 397, we get 8 and a remainder of 274.
Record the quotient 8 as the next digit in the result. 
Result so far: 31198.58
Subtract 3176 from 3450 to get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Advancing to step 11:
2740 divided by 397 is 6 with a remainder of 358.
Put 6 as the next digit of the answer. 
Result so far: 31198.586
If we subtract 2382 from 2740, we get 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Moving on to step 12:
The number 397 fits into 3580 9 times, leaving a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 31198.5869
If we subtract 3573 from 3580, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 13:
397 goes into 70 0 times with a remainder of 70.
The next digit of our result is 0. 
Result so far: 31198.5869
If we subtract 0 from 70, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 14:
If we divide 700 by 397, we get 1 and a remainder of 303.
Put 1 as the next digit of the answer. 
Result so far: 31198.586901
If we subtract 397 from 700, we get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Advancing to step 15:
397 goes into 3030 7 times with a remainder of 251.
Put 7 as the next digit of the answer. 
Result so far: 31198.5869017
If we subtract 2779 from 3030, we get 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Going ahead to step 16:
The number 397 fits into 2510 6 times, leaving a remainder of 128.
Record the quotient 6 as the next digit in the result. 
Result so far: 31198.58690176
Subtracting 2382 from 2510 leaves us with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

In conclusion, the division gives 31198.58690176 with a balance of 1.28e-07.