We divide 12398473 by 320
We want to figure out the number of times 12398473 can be divided by 320.

On to step 1:
If we divide 1 by 320, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 320

Moving on to step 2:
The number 320 fits into 12 0 times, leaving a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 320

Let's proceed to step 3:
123 divided by 320 is 0 with a remainder of 123.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 123 after subtracting 0 from 123.
Grab the next digit (9) from the dividend, add it to 123, then carry on: 1239 / 320

Moving on to step 4:
320 can be fit into 1239 3 times, resulting in a remainder of 279.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 960 away from 1239, we end up with 279.
Take the next digit (8) from the dividend and append it to 279, then repeat: 2798 / 320

Step 5:
When dividing 2798 by 320, we get 8 with a remainder of 238.
The next digit of our result is 8. 
Result so far: 38.0
If we take 2560 away from 2798, we end up with 238.
Bring next digit (4) of the dividend behind the 238 and repeat the process: 2384 / 320

Moving on to step 6:
2384 divided by 320 is 7 with a remainder of 144.
The number 7 becomes the next digit in our result. 
Result so far: 387.0
If we take 2240 away from 2384, we end up with 144.
Bring next digit (7) of the dividend behind the 144 and repeat the process: 1447 / 320

Going ahead to step 7:
320 goes into 1447 4 times with a remainder of 167.
Use 4 as the next digit of our solution. 
Result so far: 3874.0
Deduct 1280 from 1447 and we're left with 167.
Include the next digit (3) from the dividend after 167, then repeat: 1673 / 320

Advancing to step 8:
When dividing 1673 by 320, we get 5 with a remainder of 73.
Record the quotient 5 as the next digit in the result. 
Result so far: 38745.0
The remainder is 73 after subtracting 1600 from 1673.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 9:
If we divide 730 by 320, we get 2 and a remainder of 90.
Record the quotient 2 as the next digit in the result. 
Result so far: 38745.2
Deduct 640 from 730 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.

Step 10:
320 can be fit into 900 2 times, resulting in a remainder of 260.
Write down 2 as next digit of the result. 
Result so far: 38745.22
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.

Our division results in 38745.22 with a remaining 0.26.