We look at the division of 39712809 by 320 
We're looking to find how many times 320 goes into 39712809.

Moving on to step 1:
The number 320 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 320

Moving on to step 2:
320 goes into 39 0 times with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Append the next digit (7) from the dividend to 39 and continue with: 397 / 320

Advancing to step 3:
When dividing 397 by 320, we get 1 with a remainder of 77.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 320 from 397 and we're left with 77.
Include the next digit (1) from the dividend after 77, then repeat: 771 / 320

Advancing to step 4:
The number 320 fits into 771 2 times, leaving a remainder of 131.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 640 from 771 to get 131.
Include the next digit (2) from the dividend after 131, then repeat: 1312 / 320

Step 5:
The number 320 fits into 1312 4 times, leaving a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 124.0
If we take 1280 away from 1312, we end up with 32.
Grab the next digit (8) from the dividend, add it to 32, then carry on: 328 / 320

Advancing to step 6:
328 divided by 320 is 1 with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 1241.0
If we take 320 away from 328, we end up with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 320

Advancing to step 7:
320 goes into 80 0 times with a remainder of 80.
The next digit of our result is 0. 
Result so far: 12410.0
Subtracting 0 from 80 leaves us with 80.
Grab the next digit (9) from the dividend, add it to 80, then carry on: 809 / 320

Advancing to step 8:
809 divided by 320 is 2 with a remainder of 169.
Put 2 as the next digit of the answer. 
Result so far: 124102.0
Subtracting 640 from 809 leaves us with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Step 9:
The number 320 fits into 1690 5 times, leaving a remainder of 90.
Use 5 as the next digit of our solution. 
Result so far: 124102.5
Deduct 1600 from 1690 and we're left with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 10:
When dividing 900 by 320, we get 2 with a remainder of 260.
The number 2 becomes the next digit in our result. 
Result so far: 124102.52
Subtracting 640 from 900 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Going ahead to step 11:
320 goes into 2600 8 times with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 124102.528
Subtract 2560 from 2600 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 12:
400 divided by 320 is 1 with a remainder of 80.
The next digit of our result is 1. 
Result so far: 124102.5281
The remainder is 80 after subtracting 320 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 13:
320 can be fit into 800 2 times, resulting in a remainder of 160.
Record the quotient 2 as the next digit in the result. 
Result so far: 124102.52812
The remainder is 160 after subtracting 640 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 14:
The number 320 fits into 1600 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 124102.528125
If we take 1600 away from 1600, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 15:
0 divided by 320 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 124102.528125
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 16:
0 divided by 320 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 124102.528125
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 124102.528125 with a remainder of 0.0.