We divide 8425525 by 809
The aim is to understand the frequency of 809 in 8425525.

On to step 1:
809 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 809

Advancing to step 2:
809 can be fit into 84 0 times, resulting in a remainder of 84.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 84, we end up with 84.
Take the next digit (2) from the dividend and append it to 84, then repeat: 842 / 809

On to step 3:
The number 809 fits into 842 1 times, leaving a remainder of 33.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 809 from 842, we get 33.
Append the next digit (5) from the dividend to 33 and continue with: 335 / 809

Let's proceed to step 4:
335 divided by 809 is 0 with a remainder of 335.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 335, we get 335.
Include the next digit (5) from the dividend after 335, then repeat: 3355 / 809

Step 5:
3355 divided by 809 is 4 with a remainder of 119.
Record the quotient 4 as the next digit in the result. 
Result so far: 104.0
If we take 3236 away from 3355, we end up with 119.
Append the next digit (2) from the dividend to 119 and continue with: 1192 / 809

Going ahead to step 6:
1192 divided by 809 is 1 with a remainder of 383.
Write down 1 as next digit of the result. 
Result so far: 1041.0
If we subtract 809 from 1192, we get 383.
Grab the next digit (5) from the dividend, add it to 383, then carry on: 3835 / 809

On to step 7:
If we divide 3835 by 809, we get 4 and a remainder of 599.
Put 4 as the next digit of the answer. 
Result so far: 10414.0
Subtract 3236 from 3835 to get 599.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5990, and continue the process.

On to step 8:
If we divide 5990 by 809, we get 7 and a remainder of 327.
The number 7 becomes the next digit in our result. 
Result so far: 10414.7
Deduct 5663 from 5990 and we're left with 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Let's proceed to step 9:
809 goes into 3270 4 times with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 10414.74
Subtracting 3236 from 3270 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 10:
When dividing 340 by 809, we get 0 with a remainder of 340.
The next digit of our result is 0. 
Result so far: 10414.74
Subtracting 0 from 340 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

On to step 11:
3400 divided by 809 is 4 with a remainder of 164.
Record the quotient 4 as the next digit in the result. 
Result so far: 10414.7404
Subtract 3236 from 3400 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

On to step 12:
When dividing 1640 by 809, we get 2 with a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 10414.74042
The remainder is 22 after subtracting 1618 from 1640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 13:
809 can be fit into 220 0 times, resulting in a remainder of 220.
The next digit of our result is 0. 
Result so far: 10414.74042
Subtracting 0 from 220 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 14:
If we divide 2200 by 809, we get 2 and a remainder of 582.
The next digit of our result is 2. 
Result so far: 10414.7404202
If we subtract 1618 from 2200, we get 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Moving on to step 15:
When dividing 5820 by 809, we get 7 with a remainder of 157.
The next digit of our result is 7. 
Result so far: 10414.74042027
If we take 5663 away from 5820, we end up with 157.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

The final result is 10414.74042027 with a remainder of 1.57e-07.