705978 divided by 81 
The aim is to understand the frequency of 81 in 705978.

Advancing to step 1:
If we divide 7 by 81, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 81

Advancing to step 2:
81 can be fit into 70 0 times, resulting in a remainder of 70.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 70 and we're left with 70.
Bring next digit (5) of the dividend behind the 70 and repeat the process: 705 / 81

Moving on to step 3:
The number 81 fits into 705 8 times, leaving a remainder of 57.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 648 from 705 leaves us with 57.
Grab the next digit (9) from the dividend, add it to 57, then carry on: 579 / 81

Going ahead to step 4:
81 can be fit into 579 7 times, resulting in a remainder of 12.
Write down 7 as next digit of the result. 
Result so far: 87.0
If we subtract 567 from 579, we get 12.
Bring next digit (7) of the dividend behind the 12 and repeat the process: 127 / 81

Going ahead to step 5:
127 divided by 81 is 1 with a remainder of 46.
The number 1 becomes the next digit in our result. 
Result so far: 871.0
If we take 81 away from 127, we end up with 46.
Append the next digit (8) from the dividend to 46 and continue with: 468 / 81

On to step 6:
If we divide 468 by 81, we get 5 and a remainder of 63.
Use 5 as the next digit of our solution. 
Result so far: 8715.0
Subtracting 405 from 468 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 7:
If we divide 630 by 81, we get 7 and a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 8715.7
Subtract 567 from 630 to get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 8:
81 can be fit into 630 7 times, resulting in a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 8715.77
If we subtract 567 from 630, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The final outcome is 8715.77, with a leftover of 0.063.