850347 divided by 25 
The aim is to understand the frequency of 25 in 850347.

On to step 1:
When dividing 8 by 25, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 25

On to step 2:
85 divided by 25 is 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 75 from 85 and we're left with 10.
Include the next digit (0) from the dividend after 10, then repeat: 100 / 25

Moving on to step 3:
When dividing 100 by 25, we get 4 with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 34.0
Deduct 100 from 100 and we're left with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 25

On to step 4:
25 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 340.0
Subtract 0 from 3 to get 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 25

On to step 5:
25 goes into 34 1 times with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 3401.0
Subtract 25 from 34 to get 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 25

On to step 6:
The number 25 fits into 97 3 times, leaving a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 34013.0
If we subtract 75 from 97, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 7:
If we divide 220 by 25, we get 8 and a remainder of 20.
The next digit of our result is 8. 
Result so far: 34013.8
Subtracting 200 from 220 leaves us 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.

Going ahead to step 8:
25 can be fit into 200 8 times, resulting in a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 34013.88
Subtract 200 from 200 to 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.

After the division, we end up with 34013.88 and a remainder of 0.0.