We look at the division of 721997 by 31 
We want to divide 721997 by 31.

Let's proceed to step 1:
The number 31 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 31

Let's proceed to step 2:
If we divide 72 by 31, we get 2 and a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 62 from 72 leaves us with 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 31

Step 3:
31 goes into 101 3 times with a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 23.0
If we subtract 93 from 101, we get 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 31

Going ahead to step 4:
The number 31 fits into 89 2 times, leaving a remainder of 27.
The number 2 becomes the next digit in our result. 
Result so far: 232.0
If we take 62 away from 89, we end up with 27.
Grab the next digit (9) from the dividend, add it to 27, then carry on: 279 / 31

Moving on to step 5:
279 divided by 31 is 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 2329.0
Subtract 279 from 279 to get 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 31

Going ahead to step 6:
31 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 23290.0
If we take 0 away from 7, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
The number 31 fits into 70 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 23290.2
Deduct 62 from 70 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
31 goes into 80 2 times with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 23290.22
If we subtract 62 from 80, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final result is 23290.22 with a remainder of 0.018.