We divide 21431070 by 86
The aim is to understand the frequency of 86 in 21431070.

On to step 1:
86 goes into 2 0 times 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.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 86

Step 2:
86 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 86

Going ahead to step 3:
86 goes into 214 2 times with a remainder of 42.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 172 from 214 to get 42.
Bring next digit (3) of the dividend behind the 42 and repeat the process: 423 / 86

On to step 4:
When dividing 423 by 86, we get 4 with a remainder of 79.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
Deduct 344 from 423 and we're left with 79.
Take the next digit (1) from the dividend and append it to 79, then repeat: 791 / 86

On to step 5:
86 can be fit into 791 9 times, resulting in a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 249.0
Deduct 774 from 791 and we're left with 17.
Include the next digit (0) from the dividend after 17, then repeat: 170 / 86

On to step 6:
When dividing 170 by 86, we get 1 with a remainder of 84.
Put 1 as the next digit of the answer. 
Result so far: 2491.0
If we subtract 86 from 170, we get 84.
Bring next digit (7) of the dividend behind the 84 and repeat the process: 847 / 86

Going ahead to step 7:
86 goes into 847 9 times with a remainder of 73.
Put 9 as the next digit of the answer. 
Result so far: 24919.0
Deduct 774 from 847 and we're left with 73.
Bring next digit (0) of the dividend behind the 73 and repeat the process: 730 / 86

Moving on to step 8:
If we divide 730 by 86, we get 8 and a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 249198.0
Subtracting 688 from 730 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 9:
86 goes into 420 4 times with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 249198.4
If we subtract 344 from 420, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 10:
If we divide 760 by 86, we get 8 and a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 249198.48
The remainder is 72 after subtracting 688 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 11:
720 divided by 86 is 8 with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 249198.488
Subtracting 688 from 720 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

In conclusion, the division gives 249198.488 with a balance of 0.0032.