We divide 763661 by 81
The aim is to understand the frequency of 81 in 763661.

Going ahead to step 1:
If we divide 7 by 81, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 81

Let's proceed to step 2:
81 can be fit into 76 0 times, resulting in a remainder of 76.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Bring next digit (3) of the dividend behind the 76 and repeat the process: 763 / 81

Step 3:
81 can be fit into 763 9 times, resulting in a remainder of 34.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 729 from 763 to get 34.
Grab the next digit (6) from the dividend, add it to 34, then carry on: 346 / 81

On to step 4:
346 divided by 81 is 4 with a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 94.0
If we subtract 324 from 346, we get 22.
Append the next digit (6) from the dividend to 22 and continue with: 226 / 81

Let's proceed to step 5:
81 goes into 226 2 times with a remainder of 64.
The next digit of our result is 2. 
Result so far: 942.0
If we take 162 away from 226, we end up with 64.
Take the next digit (1) from the dividend and append it to 64, then repeat: 641 / 81

Going ahead to step 6:
The number 81 fits into 641 7 times, leaving a remainder of 74.
The next digit of our result is 7. 
Result so far: 9427.0
Deduct 567 from 641 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 7:
81 can be fit into 740 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 9427.9
The remainder is 11 after subtracting 729 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 8:
110 divided by 81 is 1 with a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 9427.91
If we take 81 away from 110, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 9:
290 divided by 81 is 3 with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 9427.913
The remainder is 47 after subtracting 243 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 10:
If we divide 470 by 81, we get 5 and a remainder of 65.
The next digit of our result is 5. 
Result so far: 9427.9135
Subtract 405 from 470 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 11:
81 can be fit into 650 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 9427.91358
The remainder is 2 after subtracting 648 from 650.
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 12:
20 divided by 81 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 9427.91358
Deduct 0 from 20 and we're left 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.

Moving on to step 13:
The number 81 fits into 200 2 times, leaving a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 9427.9135802
Subtract 162 from 200 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 14:
81 can be fit into 380 4 times, resulting in a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 9427.91358024
Subtracting 324 from 380 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final outcome is 9427.91358024, with a leftover of 5.6e-08.