We divide 21017200 by 86
The aim is to understand the frequency of 86 in 21017200.

Advancing to step 1:
2 divided by 86 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 86

Advancing to step 2:
21 divided by 86 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 86

Let's proceed to step 3:
When dividing 210 by 86, we get 2 with a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 172 away from 210, we end up with 38.
Grab the next digit (1) from the dividend, add it to 38, then carry on: 381 / 86

Step 4:
When dividing 381 by 86, we get 4 with a remainder of 37.
Use 4 as the next digit of our solution. 
Result so far: 24.0
If we take 344 away from 381, we end up with 37.
Fetch the next digit (7) from the dividend, attach it to 37 and continue: 377 / 86

Let's proceed to step 5:
86 goes into 377 4 times with a remainder of 33.
Record the quotient 4 as the next digit in the result. 
Result so far: 244.0
Deduct 344 from 377 and we're left with 33.
Bring next digit (2) of the dividend behind the 33 and repeat the process: 332 / 86

On to step 6:
86 goes into 332 3 times with a remainder of 74.
Put 3 as the next digit of the answer. 
Result so far: 2443.0
The remainder is 74 after subtracting 258 from 332.
Grab the next digit (0) from the dividend, add it to 74, then carry on: 740 / 86

Step 7:
When dividing 740 by 86, we get 8 with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 24438.0
The remainder is 52 after subtracting 688 from 740.
Bring next digit (0) of the dividend behind the 52 and repeat the process: 520 / 86

On to step 8:
If we divide 520 by 86, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 244386.0
The remainder is 4 after subtracting 516 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
40 divided by 86 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 244386.0
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
The number 86 fits into 400 4 times, leaving a remainder of 56.
The next digit of our result is 4. 
Result so far: 244386.04
The remainder is 56 after subtracting 344 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 11:
560 divided by 86 is 6 with a remainder of 44.
The next digit of our result is 6. 
Result so far: 244386.046
Subtract 516 from 560 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 12:
86 goes into 440 5 times with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 244386.0465
If we take 430 away from 440, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 13:
If we divide 100 by 86, we get 1 and a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 244386.04651
Subtract 86 from 100 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 14:
140 divided by 86 is 1 with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 244386.046511
Subtract 86 from 140 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

In conclusion, the division gives 244386.046511 with a balance of 5.4e-06.