We look at the division of 721990 by 15 
We want to divide 721990 by 15.

Step 1:
15 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 15

Moving on to step 2:
The number 15 fits into 72 4 times, leaving a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 60 from 72 and we're left with 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 15

Step 3:
When dividing 121 by 15, we get 8 with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 48.0
The remainder is 1 after subtracting 120 from 121.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 15

On to step 4:
If we divide 19 by 15, we get 1 and a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 481.0
If we take 15 away from 19, we end up with 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 15

Going ahead to step 5:
15 can be fit into 49 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 4813.0
Subtracting 45 from 49 leaves us with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 15

Step 6:
15 goes into 40 2 times with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 48132.0
If we take 30 away from 40, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
15 goes into 100 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 48132.6
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
15 goes into 100 6 times with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 48132.66
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 48132.66 with a remainder of 0.01.