21304543 divided by 818 
The aim is to understand the frequency of 818 in 21304543.

Step 1:
818 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 818

On to step 2:
21 divided by 818 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 818

Going ahead to step 3:
If we divide 213 by 818, we get 0 and a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 213 leaves us with 213.
Take the next digit (0) from the dividend and append it to 213, then repeat: 2130 / 818

Step 4:
When dividing 2130 by 818, we get 2 with a remainder of 494.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 494 after subtracting 1636 from 2130.
Include the next digit (4) from the dividend after 494, then repeat: 4944 / 818

On to step 5:
818 can be fit into 4944 6 times, resulting in a remainder of 36.
The next digit of our result is 6. 
Result so far: 26.0
If we take 4908 away from 4944, we end up with 36.
Bring next digit (5) of the dividend behind the 36 and repeat the process: 365 / 818

Advancing to step 6:
365 divided by 818 is 0 with a remainder of 365.
Use 0 as the next digit of our solution. 
Result so far: 260.0
Subtract 0 from 365 to get 365.
Bring next digit (4) of the dividend behind the 365 and repeat the process: 3654 / 818

Advancing to step 7:
818 goes into 3654 4 times with a remainder of 382.
Use 4 as the next digit of our solution. 
Result so far: 2604.0
Deduct 3272 from 3654 and we're left with 382.
Append the next digit (3) from the dividend to 382 and continue with: 3823 / 818

Step 8:
3823 divided by 818 is 4 with a remainder of 551.
Use 4 as the next digit of our solution. 
Result so far: 26044.0
Subtracting 3272 from 3823 leaves us with 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5510, and continue the process.

Going ahead to step 9:
5510 divided by 818 is 6 with a remainder of 602.
Record the quotient 6 as the next digit in the result. 
Result so far: 26044.6
If we take 4908 away from 5510, we end up with 602.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

Moving on to step 10:
If we divide 6020 by 818, we get 7 and a remainder of 294.
Write down 7 as next digit of the result. 
Result so far: 26044.67
If we subtract 5726 from 6020, we get 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Step 11:
If we divide 2940 by 818, we get 3 and a remainder of 486.
Put 3 as the next digit of the answer. 
Result so far: 26044.673
Subtract 2454 from 2940 to get 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

Going ahead to step 12:
818 goes into 4860 5 times with a remainder of 770.
Record the quotient 5 as the next digit in the result. 
Result so far: 26044.6735
Subtracting 4090 from 4860 leaves us with 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

Going ahead to step 13:
If we divide 7700 by 818, we get 9 and a remainder of 338.
Write down 9 as next digit of the result. 
Result so far: 26044.67359
If we subtract 7362 from 7700, we get 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Advancing to step 14:
When dividing 3380 by 818, we get 4 with a remainder of 108.
The next digit of our result is 4. 
Result so far: 26044.673594
If we subtract 3272 from 3380, we get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 15:
1080 divided by 818 is 1 with a remainder of 262.
Use 1 as the next digit of our solution. 
Result so far: 26044.6735941
If we subtract 818 from 1080, we get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Step 16:
818 can be fit into 2620 3 times, resulting in a remainder of 166.
Write down 3 as next digit of the result. 
Result so far: 26044.67359413
Subtract 2454 from 2620 to get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

After the division, we end up with 26044.67359413 and a remainder of 1.66e-07.