21241787 divided by 844 
The aim is to understand the frequency of 844 in 21241787.

Moving on to step 1:
2 divided by 844 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 844

Advancing to step 2:
If we divide 21 by 844, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 844

Advancing to step 3:
When dividing 212 by 844, we get 0 with a remainder of 212.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 212 to get 212.
Fetch the next digit (4) from the dividend, attach it to 212 and continue: 2124 / 844

On to step 4:
844 goes into 2124 2 times with a remainder of 436.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 1688 from 2124, we get 436.
Include the next digit (1) from the dividend after 436, then repeat: 4361 / 844

Let's proceed to step 5:
4361 divided by 844 is 5 with a remainder of 141.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtract 4220 from 4361 to get 141.
Fetch the next digit (7) from the dividend, attach it to 141 and continue: 1417 / 844

Going ahead to step 6:
1417 divided by 844 is 1 with a remainder of 573.
The next digit of our result is 1. 
Result so far: 251.0
Subtracting 844 from 1417 leaves us with 573.
Include the next digit (8) from the dividend after 573, then repeat: 5738 / 844

Step 7:
When dividing 5738 by 844, we get 6 with a remainder of 674.
The number 6 becomes the next digit in our result. 
Result so far: 2516.0
Deduct 5064 from 5738 and we're left with 674.
Append the next digit (7) from the dividend to 674 and continue with: 6747 / 844

On to step 8:
844 can be fit into 6747 7 times, resulting in a remainder of 839.
Put 7 as the next digit of the answer. 
Result so far: 25167.0
Subtract 5908 from 6747 to get 839.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8390, and continue the process.

Advancing to step 9:
8390 divided by 844 is 9 with a remainder of 794.
The next digit of our result is 9. 
Result so far: 25167.9
Subtracting 7596 from 8390 leaves us with 794.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7940, and continue the process.

Advancing to step 10:
If we divide 7940 by 844, we get 9 and a remainder of 344.
The number 9 becomes the next digit in our result. 
Result so far: 25167.99
Subtract 7596 from 7940 to get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

The final result is 25167.99 with a remainder of 0.344.