We're dividing 45225784 by 839 
The aim is to understand the frequency of 839 in 45225784.

Step 1:
4 divided by 839 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 839

Going ahead to step 2:
45 divided by 839 is 0 with a remainder of 45.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Bring next digit (2) of the dividend behind the 45 and repeat the process: 452 / 839

Step 3:
If we divide 452 by 839, we get 0 and a remainder of 452.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 452 and we're left with 452.
Take the next digit (2) from the dividend and append it to 452, then repeat: 4522 / 839

Going ahead to step 4:
839 can be fit into 4522 5 times, resulting in a remainder of 327.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 4195 from 4522, we get 327.
Bring next digit (5) of the dividend behind the 327 and repeat the process: 3275 / 839

Step 5:
If we divide 3275 by 839, we get 3 and a remainder of 758.
The number 3 becomes the next digit in our result. 
Result so far: 53.0
If we subtract 2517 from 3275, we get 758.
Bring next digit (7) of the dividend behind the 758 and repeat the process: 7587 / 839

On to step 6:
If we divide 7587 by 839, we get 9 and a remainder of 36.
The number 9 becomes the next digit in our result. 
Result so far: 539.0
Deduct 7551 from 7587 and we're left with 36.
Grab the next digit (8) from the dividend, add it to 36, then carry on: 368 / 839

Moving on to step 7:
839 goes into 368 0 times with a remainder of 368.
The next digit of our result is 0. 
Result so far: 5390.0
Deduct 0 from 368 and we're left with 368.
Append the next digit (4) from the dividend to 368 and continue with: 3684 / 839

Going ahead to step 8:
839 goes into 3684 4 times with a remainder of 328.
The number 4 becomes the next digit in our result. 
Result so far: 53904.0
Deduct 3356 from 3684 and we're left with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Step 9:
The number 839 fits into 3280 3 times, leaving a remainder of 763.
Write down 3 as next digit of the result. 
Result so far: 53904.3
Deduct 2517 from 3280 and we're left with 763.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7630, and continue the process.

Moving on to step 10:
If we divide 7630 by 839, we get 9 and a remainder of 79.
Record the quotient 9 as the next digit in the result. 
Result so far: 53904.39
Deduct 7551 from 7630 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 11:
790 divided by 839 is 0 with a remainder of 790.
Write down 0 as next digit of the result. 
Result so far: 53904.39
Deduct 0 from 790 and we're left with 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

On to step 12:
When dividing 7900 by 839, we get 9 with a remainder of 349.
Write down 9 as next digit of the result. 
Result so far: 53904.3909
Subtracting 7551 from 7900 leaves us with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Going ahead to step 13:
3490 divided by 839 is 4 with a remainder of 134.
The next digit of our result is 4. 
Result so far: 53904.39094
If we subtract 3356 from 3490, we get 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

On to step 14:
1340 divided by 839 is 1 with a remainder of 501.
Use 1 as the next digit of our solution. 
Result so far: 53904.390941
Subtract 839 from 1340 to get 501.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5010, and continue the process.

On to step 15:
If we divide 5010 by 839, we get 5 and a remainder of 815.
Use 5 as the next digit of our solution. 
Result so far: 53904.3909415
If we take 4195 away from 5010, we end up with 815.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8150, and continue the process.

Step 16:
839 can be fit into 8150 9 times, resulting in a remainder of 599.
Write down 9 as next digit of the result. 
Result so far: 53904.39094159
Deduct 7551 from 8150 and we're left with 599.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5990, and continue the process.

The final result is 53904.39094159 with a remainder of 5.99e-07.