435703 ÷ 81 
The aim is to understand the frequency of 81 in 435703.

Step 1:
The number 81 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 81

Going ahead to step 2:
81 goes into 43 0 times with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Fetch the next digit (5) from the dividend, attach it to 43 and continue: 435 / 81

On to step 3:
81 goes into 435 5 times with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 405 from 435 leaves us with 30.
Grab the next digit (7) from the dividend, add it to 30, then carry on: 307 / 81

Advancing to step 4:
If we divide 307 by 81, we get 3 and a remainder of 64.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
Subtracting 243 from 307 leaves us with 64.
Include the next digit (0) from the dividend after 64, then repeat: 640 / 81

Going ahead to step 5:
If we divide 640 by 81, we get 7 and a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 537.0
Subtract 567 from 640 to get 73.
Include the next digit (3) from the dividend after 73, then repeat: 733 / 81

On to step 6:
The number 81 fits into 733 9 times, leaving a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 5379.0
Subtract 729 from 733 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
40 divided by 81 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 5379.0
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
When dividing 400 by 81, we get 4 with a remainder of 76.
The next digit of our result is 4. 
Result so far: 5379.04
The remainder is 76 after subtracting 324 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 9:
When dividing 760 by 81, we get 9 with a remainder of 31.
The number 9 becomes the next digit in our result. 
Result so far: 5379.049
Subtract 729 from 760 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Let's proceed to step 10:
If we divide 310 by 81, we get 3 and a remainder of 67.
Record the quotient 3 as the next digit in the result. 
Result so far: 5379.0493
Subtract 243 from 310 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Let's proceed to step 11:
If we divide 670 by 81, we get 8 and a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 5379.04938
Subtracting 648 from 670 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 12:
The number 81 fits into 220 2 times, leaving a remainder of 58.
Write down 2 as next digit of the result. 
Result so far: 5379.049382
Subtract 162 from 220 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 13:
When dividing 580 by 81, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 5379.0493827
The remainder is 13 after subtracting 567 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 14:
130 divided by 81 is 1 with a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 5379.04938271
The remainder is 49 after subtracting 81 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Our division results in 5379.04938271 with a remaining 4.9e-08.