We divide 250971 by 81
The aim is to understand the frequency of 81 in 250971.

Step 1:
81 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.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 81

Going ahead to step 2:
81 goes into 25 0 times with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Include the next digit (0) from the dividend after 25, then repeat: 250 / 81

Advancing to step 3:
The number 81 fits into 250 3 times, leaving a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 243 from 250 leaves us with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 81

Let's proceed to step 4:
81 goes into 79 0 times with a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 30.0
If we subtract 0 from 79, we get 79.
Fetch the next digit (7) from the dividend, attach it to 79 and continue: 797 / 81

Going ahead to step 5:
The number 81 fits into 797 9 times, leaving a remainder of 68.
Use 9 as the next digit of our solution. 
Result so far: 309.0
If we take 729 away from 797, we end up with 68.
Append the next digit (1) from the dividend to 68 and continue with: 681 / 81

Step 6:
When dividing 681 by 81, we get 8 with a remainder of 33.
The number 8 becomes the next digit in our result. 
Result so far: 3098.0
Deduct 648 from 681 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 7:
81 goes into 330 4 times with a remainder of 6.
The next digit of our result is 4. 
Result so far: 3098.4
If we subtract 324 from 330, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
81 can be fit into 60 0 times, resulting in a remainder of 60.
The next digit of our result is 0. 
Result so far: 3098.4
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
81 can be fit into 600 7 times, resulting in a remainder of 33.
Write down 7 as next digit of the result. 
Result so far: 3098.407
If we take 567 away from 600, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 10:
If we divide 330 by 81, we get 4 and a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 3098.4074
Deduct 324 from 330 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 11:
81 can be fit into 60 0 times, resulting in a remainder of 60.
The next digit of our result is 0. 
Result so far: 3098.4074
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 12:
The number 81 fits into 600 7 times, leaving a remainder of 33.
Record the quotient 7 as the next digit in the result. 
Result so far: 3098.407407
The remainder is 33 after subtracting 567 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 13:
If we divide 330 by 81, we get 4 and a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 3098.4074074
The remainder is 6 after subtracting 324 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 14:
If we divide 60 by 81, we get 0 and a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 3098.4074074
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 3098.4074074 with a remaining 6e-08.