Let's divide 42510337 by 25
The aim is to understand the frequency of 25 in 42510337.

Moving on to step 1:
25 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 25

On to step 2:
If we divide 42 by 25, we get 1 and a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 17 after subtracting 25 from 42.
Include the next digit (5) from the dividend after 17, then repeat: 175 / 25

Moving on to step 3:
When dividing 175 by 25, we get 7 with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we take 175 away from 175, we end up with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 25

Advancing to step 4:
The number 25 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 170.0
If we subtract 0 from 1, we get 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 25

Advancing to step 5:
10 divided by 25 is 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 1700.0
If we take 0 away from 10, we end up with 10.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 25

Advancing to step 6:
103 divided by 25 is 4 with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 17004.0
If we subtract 100 from 103, we get 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 25

Moving on to step 7:
25 can be fit into 33 1 times, resulting in a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 170041.0
Subtract 25 from 33 to get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 25

Step 8:
When dividing 87 by 25, we get 3 with a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 1700413.0
If we take 75 away from 87, 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 25 fits into 120 4 times, leaving a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 1700413.4
Deduct 100 from 120 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
200 divided by 25 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 1700413.48
If we subtract 200 from 200, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
0 divided by 25 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1700413.48
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
When dividing 0 by 25, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1700413.48
If we subtract 0 from 0, we get 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 result is 1700413.48 with a remainder of 0.0.