We divide 31721510 by 729
The aim is to understand the frequency of 729 in 31721510.

On to step 1:
The number 729 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 729

On to step 2:
If we divide 31 by 729, we get 0 and a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Append the next digit (7) from the dividend to 31 and continue with: 317 / 729

Let's proceed to step 3:
When dividing 317 by 729, we get 0 with a remainder of 317.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 317, we end up with 317.
Bring next digit (2) of the dividend behind the 317 and repeat the process: 3172 / 729

Moving on to step 4:
When dividing 3172 by 729, we get 4 with a remainder of 256.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 2916 from 3172 leaves us with 256.
Fetch the next digit (1) from the dividend, attach it to 256 and continue: 2561 / 729

On to step 5:
729 goes into 2561 3 times with a remainder of 374.
Put 3 as the next digit of the answer. 
Result so far: 43.0
Subtracting 2187 from 2561 leaves us with 374.
Bring next digit (5) of the dividend behind the 374 and repeat the process: 3745 / 729

Advancing to step 6:
When dividing 3745 by 729, we get 5 with a remainder of 100.
The next digit of our result is 5. 
Result so far: 435.0
The remainder is 100 after subtracting 3645 from 3745.
Include the next digit (1) from the dividend after 100, then repeat: 1001 / 729

Going ahead to step 7:
729 goes into 1001 1 times with a remainder of 272.
The number 1 becomes the next digit in our result. 
Result so far: 4351.0
If we subtract 729 from 1001, we get 272.
Append the next digit (0) from the dividend to 272 and continue with: 2720 / 729

On to step 8:
729 can be fit into 2720 3 times, resulting in a remainder of 533.
The number 3 becomes the next digit in our result. 
Result so far: 43513.0
Subtracting 2187 from 2720 leaves us with 533.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5330, and continue the process.

Moving on to step 9:
729 goes into 5330 7 times with a remainder of 227.
The next digit of our result is 7. 
Result so far: 43513.7
If we subtract 5103 from 5330, we get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

On to step 10:
2270 divided by 729 is 3 with a remainder of 83.
The number 3 becomes the next digit in our result. 
Result so far: 43513.73
If we take 2187 away from 2270, we end up with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Let's proceed to step 11:
729 goes into 830 1 times with a remainder of 101.
The number 1 becomes the next digit in our result. 
Result so far: 43513.731
Subtracting 729 from 830 leaves us with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Advancing to step 12:
1010 divided by 729 is 1 with a remainder of 281.
Record the quotient 1 as the next digit in the result. 
Result so far: 43513.7311
Subtract 729 from 1010 to get 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

After the division, we end up with 43513.7311 and a remainder of 0.00281.