We divide 4640545 by 638
The aim is to understand the frequency of 638 in 4640545.

Moving on to step 1:
When dividing 4 by 638, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 638

Step 2:
The number 638 fits into 46 0 times, leaving a remainder of 46.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 46, we end up with 46.
Include the next digit (4) from the dividend after 46, then repeat: 464 / 638

Moving on to step 3:
464 divided by 638 is 0 with a remainder of 464.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 464 leaves us with 464.
Include the next digit (0) from the dividend after 464, then repeat: 4640 / 638

On to step 4:
638 goes into 4640 7 times with a remainder of 174.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 4466 from 4640 leaves us with 174.
Grab the next digit (5) from the dividend, add it to 174, then carry on: 1745 / 638

Advancing to step 5:
When dividing 1745 by 638, we get 2 with a remainder of 469.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
Subtracting 1276 from 1745 leaves us with 469.
Bring next digit (4) of the dividend behind the 469 and repeat the process: 4694 / 638

Moving on to step 6:
638 goes into 4694 7 times with a remainder of 228.
The number 7 becomes the next digit in our result. 
Result so far: 727.0
Subtracting 4466 from 4694 leaves us with 228.
Grab the next digit (5) from the dividend, add it to 228, then carry on: 2285 / 638

Step 7:
638 can be fit into 2285 3 times, resulting in a remainder of 371.
Write down 3 as next digit of the result. 
Result so far: 7273.0
The remainder is 371 after subtracting 1914 from 2285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Let's proceed to step 8:
When dividing 3710 by 638, we get 5 with a remainder of 520.
Put 5 as the next digit of the answer. 
Result so far: 7273.5
If we take 3190 away from 3710, we end up with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Advancing to step 9:
638 can be fit into 5200 8 times, resulting in a remainder of 96.
The number 8 becomes the next digit in our result. 
Result so far: 7273.58
Subtracting 5104 from 5200 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Moving on to step 10:
638 can be fit into 960 1 times, resulting in a remainder of 322.
Write down 1 as next digit of the result. 
Result so far: 7273.581
If we take 638 away from 960, we end up with 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Advancing to step 11:
If we divide 3220 by 638, we get 5 and a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 7273.5815
If we take 3190 away from 3220, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 12:
The number 638 fits into 300 0 times, leaving a remainder of 300.
Put 0 as the next digit of the answer. 
Result so far: 7273.5815
If we take 0 away from 300, we end up with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Going ahead to step 13:
The number 638 fits into 3000 4 times, leaving a remainder of 448.
Write down 4 as next digit of the result. 
Result so far: 7273.581504
Deduct 2552 from 3000 and we're left 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.

Step 14:
4480 divided by 638 is 7 with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 7273.5815047
Deduct 4466 from 4480 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 15:
The number 638 fits into 140 0 times, leaving a remainder of 140.
Use 0 as the next digit of our solution. 
Result so far: 7273.5815047
The remainder is 140 after subtracting 0 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final result is 7273.5815047 with a remainder of 1.4e-07.