We divide 79305331 by 721
The aim is to understand the frequency of 721 in 79305331.

Going ahead to step 1:
The number 721 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 721

Going ahead to step 2:
721 can be fit into 79 0 times, resulting in a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 79, we get 79.
Fetch the next digit (3) from the dividend, attach it to 79 and continue: 793 / 721

Let's proceed to step 3:
793 divided by 721 is 1 with a remainder of 72.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 721 from 793 and we're left with 72.
Include the next digit (0) from the dividend after 72, then repeat: 720 / 721

Going ahead to step 4:
720 divided by 721 is 0 with a remainder of 720.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 720, we get 720.
Include the next digit (5) from the dividend after 720, then repeat: 7205 / 721

Moving on to step 5:
When dividing 7205 by 721, we get 9 with a remainder of 716.
The number 9 becomes the next digit in our result. 
Result so far: 109.0
If we subtract 6489 from 7205, we get 716.
Include the next digit (3) from the dividend after 716, then repeat: 7163 / 721

On to step 6:
The number 721 fits into 7163 9 times, leaving a remainder of 674.
Record the quotient 9 as the next digit in the result. 
Result so far: 1099.0
The remainder is 674 after subtracting 6489 from 7163.
Grab the next digit (3) from the dividend, add it to 674, then carry on: 6743 / 721

On to step 7:
When dividing 6743 by 721, we get 9 with a remainder of 254.
Use 9 as the next digit of our solution. 
Result so far: 10999.0
Subtracting 6489 from 6743 leaves us with 254.
Take the next digit (1) from the dividend and append it to 254, then repeat: 2541 / 721

Moving on to step 8:
The number 721 fits into 2541 3 times, leaving a remainder of 378.
Use 3 as the next digit of our solution. 
Result so far: 109993.0
The remainder is 378 after subtracting 2163 from 2541.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Moving on to step 9:
The number 721 fits into 3780 5 times, leaving a remainder of 175.
Put 5 as the next digit of the answer. 
Result so far: 109993.5
If we subtract 3605 from 3780, we get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Step 10:
The number 721 fits into 1750 2 times, leaving a remainder of 308.
The next digit of our result is 2. 
Result so far: 109993.52
Subtract 1442 from 1750 to get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

On to step 11:
When dividing 3080 by 721, we get 4 with a remainder of 196.
Record the quotient 4 as the next digit in the result. 
Result so far: 109993.524
If we take 2884 away from 3080, we end up with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Moving on to step 12:
The number 721 fits into 1960 2 times, leaving a remainder of 518.
Use 2 as the next digit of our solution. 
Result so far: 109993.5242
If we subtract 1442 from 1960, we get 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Step 13:
5180 divided by 721 is 7 with a remainder of 133.
The next digit of our result is 7. 
Result so far: 109993.52427
If we subtract 5047 from 5180, we get 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Advancing to step 14:
721 goes into 1330 1 times with a remainder of 609.
Use 1 as the next digit of our solution. 
Result so far: 109993.524271
If we subtract 721 from 1330, we get 609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6090, and continue the process.

Going ahead to step 15:
6090 divided by 721 is 8 with a remainder of 322.
Record the quotient 8 as the next digit in the result. 
Result so far: 109993.5242718
Subtracting 5768 from 6090 leaves us with 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

On to step 16:
721 goes into 3220 4 times with a remainder of 336.
The number 4 becomes the next digit in our result. 
Result so far: 109993.52427184
If we take 2884 away from 3220, we end up with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

The quotient of the division is 109993.52427184, and the remainder is 3.36e-07.