We're dividing 12398976 by 603 
The aim is to understand the frequency of 603 in 12398976.

Going ahead to step 1:
If we divide 1 by 603, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 603

Moving on to step 2:
603 goes into 12 0 times with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 603

Step 3:
603 can be fit into 123 0 times, resulting in a remainder of 123.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 123 to get 123.
Fetch the next digit (9) from the dividend, attach it to 123 and continue: 1239 / 603

Let's proceed to step 4:
603 goes into 1239 2 times with a remainder of 33.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 1206 from 1239 to get 33.
Bring next digit (8) of the dividend behind the 33 and repeat the process: 338 / 603

Moving on to step 5:
When dividing 338 by 603, we get 0 with a remainder of 338.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Subtracting 0 from 338 leaves us with 338.
Grab the next digit (9) from the dividend, add it to 338, then carry on: 3389 / 603

Moving on to step 6:
If we divide 3389 by 603, we get 5 and a remainder of 374.
Use 5 as the next digit of our solution. 
Result so far: 205.0
Subtract 3015 from 3389 to get 374.
Include the next digit (7) from the dividend after 374, then repeat: 3747 / 603

On to step 7:
When dividing 3747 by 603, we get 6 with a remainder of 129.
Write down 6 as next digit of the result. 
Result so far: 2056.0
The remainder is 129 after subtracting 3618 from 3747.
Take the next digit (6) from the dividend and append it to 129, then repeat: 1296 / 603

Going ahead to step 8:
603 can be fit into 1296 2 times, resulting in a remainder of 90.
The number 2 becomes the next digit in our result. 
Result so far: 20562.0
If we take 1206 away from 1296, we end up 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.

Advancing to step 9:
900 divided by 603 is 1 with a remainder of 297.
The next digit of our result is 1. 
Result so far: 20562.1
Subtract 603 from 900 to get 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Moving on to step 10:
If we divide 2970 by 603, we get 4 and a remainder of 558.
Record the quotient 4 as the next digit in the result. 
Result so far: 20562.14
Subtracting 2412 from 2970 leaves us with 558.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5580, and continue the process.

Advancing to step 11:
603 goes into 5580 9 times with a remainder of 153.
The next digit of our result is 9. 
Result so far: 20562.149
The remainder is 153 after subtracting 5427 from 5580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Moving on to step 12:
603 goes into 1530 2 times with a remainder of 324.
Write down 2 as next digit of the result. 
Result so far: 20562.1492
The remainder is 324 after subtracting 1206 from 1530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Moving on to step 13:
If we divide 3240 by 603, we get 5 and a remainder of 225.
Record the quotient 5 as the next digit in the result. 
Result so far: 20562.14925
If we subtract 3015 from 3240, we get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

On to step 14:
603 goes into 2250 3 times with a remainder of 441.
The next digit of our result is 3. 
Result so far: 20562.149253
The remainder is 441 after subtracting 1809 from 2250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Let's proceed to step 15:
603 goes into 4410 7 times with a remainder of 189.
Use 7 as the next digit of our solution. 
Result so far: 20562.1492537
Subtract 4221 from 4410 to get 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Moving on to step 16:
1890 divided by 603 is 3 with a remainder of 81.
The number 3 becomes the next digit in our result. 
Result so far: 20562.14925373
Subtracting 1809 from 1890 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

The quotient of the division is 20562.14925373, and the remainder is 8.1e-08.