847889 ÷ 81 
The aim is to understand the frequency of 81 in 847889.

Advancing to step 1:
8 divided by 81 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 81

Advancing to step 2:
If we divide 84 by 81, we get 1 and a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 3 after subtracting 81 from 84.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 81

Step 3:
81 goes into 37 0 times with a remainder of 37.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 37 leaves us with 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 81

Advancing to step 4:
The number 81 fits into 378 4 times, leaving a remainder of 54.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
Subtracting 324 from 378 leaves us with 54.
Fetch the next digit (8) from the dividend, attach it to 54 and continue: 548 / 81

Going ahead to step 5:
If we divide 548 by 81, we get 6 and a remainder of 62.
Use 6 as the next digit of our solution. 
Result so far: 1046.0
Subtracting 486 from 548 leaves us with 62.
Include the next digit (9) from the dividend after 62, then repeat: 629 / 81

Advancing to step 6:
81 can be fit into 629 7 times, resulting in a remainder of 62.
Write down 7 as next digit of the result. 
Result so far: 10467.0
If we take 567 away from 629, we end up 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 7:
If we divide 620 by 81, we get 7 and a remainder of 53.
Record the quotient 7 as the next digit in the result. 
Result so far: 10467.7
Subtracting 567 from 620 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

On to step 8:
81 goes into 530 6 times with a remainder of 44.
The next digit of our result is 6. 
Result so far: 10467.76
Subtracting 486 from 530 leaves us with 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 9:
81 can be fit into 440 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 10467.765
Subtract 405 from 440 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 10:
81 can be fit into 350 4 times, resulting in a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 10467.7654
Deduct 324 from 350 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 11:
81 can be fit into 260 3 times, resulting in a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 10467.76543
The remainder is 17 after subtracting 243 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 12:
The number 81 fits into 170 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 10467.765432
Deduct 162 from 170 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 13:
80 divided by 81 is 0 with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 10467.765432
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 14:
800 divided by 81 is 9 with a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 10467.76543209
If we subtract 729 from 800, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

After the division, we end up with 10467.76543209 and a remainder of 7.1e-08.