80684200 ÷ 898 
The aim is to understand the frequency of 898 in 80684200.

Going ahead to step 1:
8 divided by 898 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 898

Moving on to step 2:
When dividing 80 by 898, we get 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Fetch the next digit (6) from the dividend, attach it to 80 and continue: 806 / 898

Moving on to step 3:
The number 898 fits into 806 0 times, leaving a remainder of 806.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 806, we end up with 806.
Include the next digit (8) from the dividend after 806, then repeat: 8068 / 898

On to step 4:
If we divide 8068 by 898, we get 8 and a remainder of 884.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 7184 from 8068, we get 884.
Append the next digit (4) from the dividend to 884 and continue with: 8844 / 898

Advancing to step 5:
898 can be fit into 8844 9 times, resulting in a remainder of 762.
Put 9 as the next digit of the answer. 
Result so far: 89.0
Subtract 8082 from 8844 to get 762.
Fetch the next digit (2) from the dividend, attach it to 762 and continue: 7622 / 898

On to step 6:
When dividing 7622 by 898, we get 8 with a remainder of 438.
Write down 8 as next digit of the result. 
Result so far: 898.0
Subtract 7184 from 7622 to get 438.
Bring next digit (0) of the dividend behind the 438 and repeat the process: 4380 / 898

Step 7:
The number 898 fits into 4380 4 times, leaving a remainder of 788.
Put 4 as the next digit of the answer. 
Result so far: 8984.0
Subtract 3592 from 4380 to get 788.
Include the next digit (0) from the dividend after 788, then repeat: 7880 / 898

Moving on to step 8:
If we divide 7880 by 898, we get 8 and a remainder of 696.
The number 8 becomes the next digit in our result. 
Result so far: 89848.0
Subtracting 7184 from 7880 leaves us with 696.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6960, and continue the process.

Moving on to step 9:
The number 898 fits into 6960 7 times, leaving a remainder of 674.
The next digit of our result is 7. 
Result so far: 89848.7
If we take 6286 away from 6960, we end up with 674.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6740, and continue the process.

On to step 10:
When dividing 6740 by 898, we get 7 with a remainder of 454.
The number 7 becomes the next digit in our result. 
Result so far: 89848.77
Deduct 6286 from 6740 and we're left with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

After the division, we end up with 89848.77 and a remainder of 0.454.