Let's divide 39124239 by 321
We want to figure out the number of times 39124239 can be divided by 321.

Let's proceed to step 1:
When dividing 3 by 321, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 321

Advancing to step 2:
321 goes into 39 0 times with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 321

Step 3:
391 divided by 321 is 1 with a remainder of 70.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 321 from 391 leaves us with 70.
Append the next digit (2) from the dividend to 70 and continue with: 702 / 321

Going ahead to step 4:
When dividing 702 by 321, we get 2 with a remainder of 60.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 642 from 702 leaves us with 60.
Take the next digit (4) from the dividend and append it to 60, then repeat: 604 / 321

Let's proceed to step 5:
321 can be fit into 604 1 times, resulting in a remainder of 283.
The number 1 becomes the next digit in our result. 
Result so far: 121.0
If we subtract 321 from 604, we get 283.
Fetch the next digit (2) from the dividend, attach it to 283 and continue: 2832 / 321

Moving on to step 6:
321 can be fit into 2832 8 times, resulting in a remainder of 264.
Use 8 as the next digit of our solution. 
Result so far: 1218.0
If we subtract 2568 from 2832, we get 264.
Include the next digit (3) from the dividend after 264, then repeat: 2643 / 321

Moving on to step 7:
321 can be fit into 2643 8 times, resulting in a remainder of 75.
The next digit of our result is 8. 
Result so far: 12188.0
Subtract 2568 from 2643 to get 75.
Include the next digit (9) from the dividend after 75, then repeat: 759 / 321

Moving on to step 8:
When dividing 759 by 321, we get 2 with a remainder of 117.
Write down 2 as next digit of the result. 
Result so far: 121882.0
If we subtract 642 from 759, we get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Moving on to step 9:
1170 divided by 321 is 3 with a remainder of 207.
The next digit of our result is 3. 
Result so far: 121882.3
If we subtract 963 from 1170, we get 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

On to step 10:
If we divide 2070 by 321, we get 6 and a remainder of 144.
The number 6 becomes the next digit in our result. 
Result so far: 121882.36
Subtracting 1926 from 2070 leaves us with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Going ahead to step 11:
321 goes into 1440 4 times with a remainder of 156.
Write down 4 as next digit of the result. 
Result so far: 121882.364
If we take 1284 away from 1440, we end up with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Going ahead to step 12:
If we divide 1560 by 321, we get 4 and a remainder of 276.
Use 4 as the next digit of our solution. 
Result so far: 121882.3644
Subtract 1284 from 1560 to get 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

The final outcome is 121882.3644, with a leftover of 0.00276.