Let's divide 581988 by 81
The aim is to understand the frequency of 81 in 581988.

Moving on to step 1:
81 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 81

Advancing to step 2:
58 divided by 81 is 0 with a remainder of 58.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 58 after subtracting 0 from 58.
Append the next digit (1) from the dividend to 58 and continue with: 581 / 81

On to step 3:
581 divided by 81 is 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 567 from 581 to get 14.
Bring next digit (9) of the dividend behind the 14 and repeat the process: 149 / 81

Going ahead to step 4:
81 can be fit into 149 1 times, resulting in a remainder of 68.
Write down 1 as next digit of the result. 
Result so far: 71.0
The remainder is 68 after subtracting 81 from 149.
Append the next digit (8) from the dividend to 68 and continue with: 688 / 81

Let's proceed to step 5:
If we divide 688 by 81, we get 8 and a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 718.0
Subtract 648 from 688 to get 40.
Bring next digit (8) of the dividend behind the 40 and repeat the process: 408 / 81

Going ahead to step 6:
When dividing 408 by 81, we get 5 with a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 7185.0
If we subtract 405 from 408, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
81 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 7185.0
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
81 goes into 300 3 times with a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 7185.03
If we take 243 away from 300, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 9:
When dividing 570 by 81, we get 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 7185.037
Deduct 567 from 570 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 10:
30 divided by 81 is 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 7185.037
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
If we divide 300 by 81, we get 3 and a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 7185.03703
If we subtract 243 from 300, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 12:
81 goes into 570 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 7185.037037
If we subtract 567 from 570, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 13:
When dividing 30 by 81, we get 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 7185.037037
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 14:
The number 81 fits into 300 3 times, leaving a remainder of 57.
The next digit of our result is 3. 
Result so far: 7185.03703703
If we subtract 243 from 300, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Our division results in 7185.03703703 with a remaining 5.7e-08.