Let's divide 40302542 by 15
The aim is to understand the frequency of 15 in 40302542.

Let's proceed to step 1:
If we divide 4 by 15, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 15

Going ahead to step 2:
15 can be fit into 40 2 times, resulting in a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 30 from 40 and we're left with 10.
Fetch the next digit (3) from the dividend, attach it to 10 and continue: 103 / 15

Let's proceed to step 3:
The number 15 fits into 103 6 times, leaving a remainder of 13.
Put 6 as the next digit of the answer. 
Result so far: 26.0
If we take 90 away from 103, we end up with 13.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 15

On to step 4:
When dividing 130 by 15, we get 8 with a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 268.0
If we subtract 120 from 130, we get 10.
Append the next digit (2) from the dividend to 10 and continue with: 102 / 15

Step 5:
When dividing 102 by 15, we get 6 with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 2686.0
Deduct 90 from 102 and we're left with 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 15

Moving on to step 6:
The number 15 fits into 125 8 times, leaving a remainder of 5.
The next digit of our result is 8. 
Result so far: 26868.0
Deduct 120 from 125 and we're left with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 15

Moving on to step 7:
The number 15 fits into 54 3 times, leaving a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 268683.0
If we take 45 away from 54, we end up with 9.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 15

Advancing to step 8:
If we divide 92 by 15, we get 6 and a remainder of 2.
The next digit of our result is 6. 
Result so far: 2686836.0
The remainder is 2 after subtracting 90 from 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 9:
15 goes into 20 1 times with a remainder of 5.
The next digit of our result is 1. 
Result so far: 2686836.1
The remainder is 5 after subtracting 15 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 10:
If we divide 50 by 15, we get 3 and a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 2686836.13
If we take 45 away from 50, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 11:
15 goes into 50 3 times with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 2686836.133
Subtracting 45 from 50 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 2686836.133, with a leftover of 0.0005.