Let's divide 743139 by 81
The aim is to understand the frequency of 81 in 743139.

Let's proceed to step 1:
The number 81 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 81

On to step 2:
The number 81 fits into 74 0 times, leaving a remainder of 74.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 74 to get 74.
Grab the next digit (3) from the dividend, add it to 74, then carry on: 743 / 81

On to step 3:
81 can be fit into 743 9 times, resulting in a remainder of 14.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 729 from 743 leaves us with 14.
Take the next digit (1) from the dividend and append it to 14, then repeat: 141 / 81

Moving on to step 4:
If we divide 141 by 81, we get 1 and a remainder of 60.
The number 1 becomes the next digit in our result. 
Result so far: 91.0
If we take 81 away from 141, we end up with 60.
Fetch the next digit (3) from the dividend, attach it to 60 and continue: 603 / 81

Let's proceed to step 5:
If we divide 603 by 81, we get 7 and a remainder of 36.
Use 7 as the next digit of our solution. 
Result so far: 917.0
Subtract 567 from 603 to get 36.
Include the next digit (9) from the dividend after 36, then repeat: 369 / 81

Advancing to step 6:
If we divide 369 by 81, we get 4 and a remainder of 45.
Write down 4 as next digit of the result. 
Result so far: 9174.0
The remainder is 45 after subtracting 324 from 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 7:
The number 81 fits into 450 5 times, leaving a remainder of 45.
The next digit of our result is 5. 
Result so far: 9174.5
Subtract 405 from 450 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 8:
81 can be fit into 450 5 times, resulting in a remainder of 45.
The next digit of our result is 5. 
Result so far: 9174.55
Subtract 405 from 450 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

After the division, we end up with 9174.55 and a remainder of 0.045.