We're dividing 100587 by 72 
The aim is to understand the frequency of 72 in 100587.

On to step 1:
When dividing 1 by 72, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 72

Going ahead to step 2:
If we divide 10 by 72, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Take the next digit (0) from the dividend and append it to 10, then repeat: 100 / 72

Going ahead to step 3:
If we divide 100 by 72, we get 1 and a remainder of 28.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 72 from 100 and we're left with 28.
Append the next digit (5) from the dividend to 28 and continue with: 285 / 72

Going ahead to step 4:
72 goes into 285 3 times with a remainder of 69.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 216 from 285 to get 69.
Append the next digit (8) from the dividend to 69 and continue with: 698 / 72

Step 5:
If we divide 698 by 72, we get 9 and a remainder of 50.
The number 9 becomes the next digit in our result. 
Result so far: 139.0
The remainder is 50 after subtracting 648 from 698.
Fetch the next digit (7) from the dividend, attach it to 50 and continue: 507 / 72

On to step 6:
When dividing 507 by 72, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 1397.0
The remainder is 3 after subtracting 504 from 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
72 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 1397.0
Subtracting 0 from 30 leaves us 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.

On to step 8:
The number 72 fits into 300 4 times, leaving a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 1397.04
If we take 288 away from 300, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
The number 72 fits into 120 1 times, leaving a remainder of 48.
Put 1 as the next digit of the answer. 
Result so far: 1397.041
Subtract 72 from 120 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 10:
The number 72 fits into 480 6 times, leaving a remainder of 48.
The next digit of our result is 6. 
Result so far: 1397.0416
If we take 432 away from 480, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 11:
72 goes into 480 6 times with a remainder of 48.
The next digit of our result is 6. 
Result so far: 1397.04166
If we subtract 432 from 480, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Our division results in 1397.04166 with a remaining 4.8e-05.