We divide 723421 by 86
The aim is to understand the frequency of 86 in 723421.

Going ahead to step 1:
7 divided by 86 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 86

Let's proceed to step 2:
If we divide 72 by 86, we get 0 and a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Bring next digit (3) of the dividend behind the 72 and repeat the process: 723 / 86

Going ahead to step 3:
When dividing 723 by 86, we get 8 with a remainder of 35.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 35 after subtracting 688 from 723.
Grab the next digit (4) from the dividend, add it to 35, then carry on: 354 / 86

Going ahead to step 4:
The number 86 fits into 354 4 times, leaving a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 84.0
If we subtract 344 from 354, we get 10.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 86

Moving on to step 5:
86 can be fit into 102 1 times, resulting in a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 841.0
Deduct 86 from 102 and we're left with 16.
Grab the next digit (1) from the dividend, add it to 16, then carry on: 161 / 86

Going ahead to step 6:
86 goes into 161 1 times with a remainder of 75.
The next digit of our result is 1. 
Result so far: 8411.0
Subtracting 86 from 161 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 7:
86 can be fit into 750 8 times, resulting in a remainder of 62.
The number 8 becomes the next digit in our result. 
Result so far: 8411.8
Deduct 688 from 750 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 8:
620 divided by 86 is 7 with a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 8411.87
The remainder is 18 after subtracting 602 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 9:
86 can be fit into 180 2 times, resulting in a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 8411.872
Subtract 172 from 180 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
The number 86 fits into 80 0 times, leaving a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 8411.872
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 11:
86 can be fit into 800 9 times, resulting in a remainder of 26.
The next digit of our result is 9. 
Result so far: 8411.87209
Subtract 774 from 800 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 12:
The number 86 fits into 260 3 times, leaving a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 8411.872093
The remainder is 2 after subtracting 258 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 13:
If we divide 20 by 86, we get 0 and a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 8411.872093
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 14:
200 divided by 86 is 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 8411.87209302
If we subtract 172 from 200, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final result is 8411.87209302 with a remainder of 2.8e-08.