We divide 721791 by 10
The aim is to understand the frequency of 10 in 721791.

On to step 1:
10 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 10

Moving on to step 2:
If we divide 72 by 10, we get 7 and a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 70 from 72 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 10

On to step 3:
When dividing 21 by 10, we get 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 72.0
If we subtract 20 from 21, we get 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 10

Moving on to step 4:
The number 10 fits into 17 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 721.0
Subtracting 10 from 17 leaves us with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 10

Advancing to step 5:
The number 10 fits into 79 7 times, leaving a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 7217.0
Subtract 70 from 79 to get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 10

On to step 6:
10 can be fit into 91 9 times, resulting in a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 72179.0
If we take 90 away from 91, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
10 divided by 10 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 72179.1
Subtracting 10 from 10 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
0 divided by 10 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 72179.1
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
10 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 72179.1
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 72179.1 with a remainder of 0.0.