We divide 723126 by 15
The aim is to understand the frequency of 15 in 723126.

Advancing to step 1:
When dividing 7 by 15, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 15

On to step 2:
15 goes into 72 4 times with a remainder of 12.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 60 from 72 leaves us with 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 15

Moving on to step 3:
The number 15 fits into 123 8 times, leaving a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
If we subtract 120 from 123, we get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 15

Step 4:
When dividing 31 by 15, we get 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 482.0
If we take 30 away from 31, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 15

On to step 5:
15 can be fit into 12 0 times, resulting in a remainder of 12.
The next digit of our result is 0. 
Result so far: 4820.0
Subtract 0 from 12 to get 12.
Fetch the next digit (6) from the dividend, attach it to 12 and continue: 126 / 15

Advancing to step 6:
The number 15 fits into 126 8 times, leaving a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 48208.0
The remainder is 6 after subtracting 120 from 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
If we divide 60 by 15, we get 4 and a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 48208.4
Subtracting 60 from 60 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
When dividing 0 by 15, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 48208.4
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
15 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 48208.4
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 48208.4, with a leftover of 0.0.