We look at the division of 721613 by 75 
We want to figure out the number of times 721613 can be divided by 75.

Let's proceed to step 1:
75 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 75

Moving on to step 2:
The number 75 fits into 72 0 times, leaving a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Append the next digit (1) from the dividend to 72 and continue with: 721 / 75

Advancing to step 3:
When dividing 721 by 75, we get 9 with a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 675 from 721, we get 46.
Include the next digit (6) from the dividend after 46, then repeat: 466 / 75

Step 4:
If we divide 466 by 75, we get 6 and a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 96.0
If we take 450 away from 466, we end up with 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 75

Let's proceed to step 5:
75 goes into 161 2 times with a remainder of 11.
Put 2 as the next digit of the answer. 
Result so far: 962.0
The remainder is 11 after subtracting 150 from 161.
Include the next digit (3) from the dividend after 11, then repeat: 113 / 75

Let's proceed to step 6:
If we divide 113 by 75, we get 1 and a remainder of 38.
The number 1 becomes the next digit in our result. 
Result so far: 9621.0
Subtracting 75 from 113 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 7:
When dividing 380 by 75, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 9621.5
The remainder is 5 after subtracting 375 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
When dividing 50 by 75, we get 0 with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 9621.5
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 9:
500 divided by 75 is 6 with a remainder of 50.
Write down 6 as next digit of the result. 
Result so far: 9621.506
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 10:
500 divided by 75 is 6 with a remainder of 50.
The number 6 becomes the next digit in our result. 
Result so far: 9621.5066
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 9621.5066 with a remainder of 0.0005.