15939552 divided by 638 
The aim is to understand the frequency of 638 in 15939552.

Advancing to step 1:
1 divided by 638 is 0 with 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 (5) from the dividend, add it to 1, then carry on: 15 / 638

Let's proceed to step 2:
The number 638 fits into 15 0 times, leaving a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 638

Advancing to step 3:
638 goes into 159 0 times with a remainder of 159.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 159, we end up with 159.
Bring next digit (3) of the dividend behind the 159 and repeat the process: 1593 / 638

Step 4:
When dividing 1593 by 638, we get 2 with a remainder of 317.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 317 after subtracting 1276 from 1593.
Include the next digit (9) from the dividend after 317, then repeat: 3179 / 638

On to step 5:
When dividing 3179 by 638, we get 4 with a remainder of 627.
Write down 4 as next digit of the result. 
Result so far: 24.0
Subtract 2552 from 3179 to get 627.
Take the next digit (5) from the dividend and append it to 627, then repeat: 6275 / 638

Moving on to step 6:
When dividing 6275 by 638, we get 9 with a remainder of 533.
Record the quotient 9 as the next digit in the result. 
Result so far: 249.0
Subtracting 5742 from 6275 leaves us with 533.
Take the next digit (5) from the dividend and append it to 533, then repeat: 5335 / 638

Let's proceed to step 7:
When dividing 5335 by 638, we get 8 with a remainder of 231.
Put 8 as the next digit of the answer. 
Result so far: 2498.0
If we subtract 5104 from 5335, we get 231.
Include the next digit (2) from the dividend after 231, then repeat: 2312 / 638

Going ahead to step 8:
2312 divided by 638 is 3 with a remainder of 398.
Put 3 as the next digit of the answer. 
Result so far: 24983.0
Subtract 1914 from 2312 to get 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Step 9:
If we divide 3980 by 638, we get 6 and a remainder of 152.
The number 6 becomes the next digit in our result. 
Result so far: 24983.6
Deduct 3828 from 3980 and we're left with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Step 10:
When dividing 1520 by 638, we get 2 with a remainder of 244.
The number 2 becomes the next digit in our result. 
Result so far: 24983.62
Deduct 1276 from 1520 and we're left with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

On to step 11:
2440 divided by 638 is 3 with a remainder of 526.
Write down 3 as next digit of the result. 
Result so far: 24983.623
Subtracting 1914 from 2440 leaves us with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

On to step 12:
5260 divided by 638 is 8 with a remainder of 156.
Record the quotient 8 as the next digit in the result. 
Result so far: 24983.6238
Subtract 5104 from 5260 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Let's proceed to step 13:
638 can be fit into 1560 2 times, resulting in a remainder of 284.
Put 2 as the next digit of the answer. 
Result so far: 24983.62382
Subtracting 1276 from 1560 leaves us with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Advancing to step 14:
638 can be fit into 2840 4 times, resulting in a remainder of 288.
Record the quotient 4 as the next digit in the result. 
Result so far: 24983.623824
If we subtract 2552 from 2840, we get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Advancing to step 15:
If we divide 2880 by 638, we get 4 and a remainder of 328.
Put 4 as the next digit of the answer. 
Result so far: 24983.6238244
Subtract 2552 from 2880 to get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

The final result is 24983.6238244 with a remainder of 3.28e-06.