We look at the division of 740181 by 81 
The aim is to understand the frequency of 81 in 740181.

Let's proceed 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
The remainder is 7 after subtracting 0 from 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 81

Let's proceed 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.
Take the next digit (0) from the dividend and append it to 74, then repeat: 740 / 81

Going ahead to step 3:
When dividing 740 by 81, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 729 from 740 and we're left with 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 81

Moving on to step 4:
The number 81 fits into 111 1 times, leaving a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 91.0
Subtract 81 from 111 to get 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 81

Advancing to step 5:
81 goes into 308 3 times with a remainder of 65.
Put 3 as the next digit of the answer. 
Result so far: 913.0
The remainder is 65 after subtracting 243 from 308.
Bring next digit (1) of the dividend behind the 65 and repeat the process: 651 / 81

Moving on to step 6:
81 can be fit into 651 8 times, resulting in a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 9138.0
Subtract 648 from 651 to 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.

Moving on to step 7:
The number 81 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 9138.0
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.

Advancing to step 8:
81 goes into 300 3 times with a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 9138.03
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 9:
570 divided by 81 is 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 9138.037
Subtract 567 from 570 to 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.

Moving on to step 10:
The number 81 fits into 30 0 times, leaving a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 9138.037
Subtract 0 from 30 to 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.

On to step 11:
81 can be fit into 300 3 times, resulting in a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 9138.03703
The remainder is 57 after subtracting 243 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 12:
570 divided by 81 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 9138.037037
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 13:
81 goes into 30 0 times with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 9138.037037
Subtract 0 from 30 to 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.

Moving on to step 14:
300 divided by 81 is 3 with a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 9138.03703703
Deduct 243 from 300 and we're left 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.

Our division results in 9138.03703703 with a remaining 5.7e-08.