39543217 ÷ 603 
The aim is to understand the frequency of 603 in 39543217.

Moving on to step 1:
The number 603 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 603

Moving on to step 2:
If we divide 39 by 603, we get 0 and a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Append the next digit (5) from the dividend to 39 and continue with: 395 / 603

Let's proceed to step 3:
395 divided by 603 is 0 with a remainder of 395.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 395 leaves us with 395.
Bring next digit (4) of the dividend behind the 395 and repeat the process: 3954 / 603

Moving on to step 4:
When dividing 3954 by 603, we get 6 with a remainder of 336.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 3618 away from 3954, we end up with 336.
Bring next digit (3) of the dividend behind the 336 and repeat the process: 3363 / 603

Advancing to step 5:
When dividing 3363 by 603, we get 5 with a remainder of 348.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
Deduct 3015 from 3363 and we're left with 348.
Bring next digit (2) of the dividend behind the 348 and repeat the process: 3482 / 603

On to step 6:
603 goes into 3482 5 times with a remainder of 467.
The next digit of our result is 5. 
Result so far: 655.0
Subtract 3015 from 3482 to get 467.
Bring next digit (1) of the dividend behind the 467 and repeat the process: 4671 / 603

Moving on to step 7:
603 goes into 4671 7 times with a remainder of 450.
The next digit of our result is 7. 
Result so far: 6557.0
Deduct 4221 from 4671 and we're left with 450.
Fetch the next digit (7) from the dividend, attach it to 450 and continue: 4507 / 603

Advancing to step 8:
If we divide 4507 by 603, we get 7 and a remainder of 286.
Use 7 as the next digit of our solution. 
Result so far: 65577.0
Deduct 4221 from 4507 and we're left with 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Going ahead to step 9:
The number 603 fits into 2860 4 times, leaving a remainder of 448.
Record the quotient 4 as the next digit in the result. 
Result so far: 65577.4
Subtracting 2412 from 2860 leaves us with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Moving on to step 10:
If we divide 4480 by 603, we get 7 and a remainder of 259.
Use 7 as the next digit of our solution. 
Result so far: 65577.47
Subtracting 4221 from 4480 leaves us with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

On to step 11:
When dividing 2590 by 603, we get 4 with a remainder of 178.
Use 4 as the next digit of our solution. 
Result so far: 65577.474
If we subtract 2412 from 2590, we get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Advancing to step 12:
When dividing 1780 by 603, we get 2 with a remainder of 574.
The next digit of our result is 2. 
Result so far: 65577.4742
Subtracting 1206 from 1780 leaves us with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

On to step 13:
603 can be fit into 5740 9 times, resulting in a remainder of 313.
Use 9 as the next digit of our solution. 
Result so far: 65577.47429
Subtracting 5427 from 5740 leaves us with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Advancing to step 14:
The number 603 fits into 3130 5 times, leaving a remainder of 115.
Record the quotient 5 as the next digit in the result. 
Result so far: 65577.474295
If we subtract 3015 from 3130, we get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

On to step 15:
The number 603 fits into 1150 1 times, leaving a remainder of 547.
Write down 1 as next digit of the result. 
Result so far: 65577.4742951
Subtract 603 from 1150 to get 547.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5470, and continue the process.

On to step 16:
The number 603 fits into 5470 9 times, leaving a remainder of 43.
Put 9 as the next digit of the answer. 
Result so far: 65577.47429519
The remainder is 43 after subtracting 5427 from 5470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The quotient of the division is 65577.47429519, and the remainder is 4.3e-08.