Let's divide 721539 by 45
We want to figure out the number of times 721539 can be divided by 45.

On to step 1:
If we divide 7 by 45, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 45

Advancing to step 2:
If we divide 72 by 45, we get 1 and a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 45 from 72, we get 27.
Bring next digit (1) of the dividend behind the 27 and repeat the process: 271 / 45

Let's proceed to step 3:
45 can be fit into 271 6 times, resulting in a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 16.0
The remainder is 1 after subtracting 270 from 271.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 45

Moving on to step 4:
When dividing 15 by 45, we get 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 160.0
Subtract 0 from 15 to get 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 45

Advancing to step 5:
45 can be fit into 153 3 times, resulting in a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 1603.0
If we take 135 away from 153, we end up with 18.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 45

Moving on to step 6:
45 can be fit into 189 4 times, resulting in a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 16034.0
Subtract 180 from 189 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
45 can be fit into 90 2 times, resulting in a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 16034.2
Subtracting 90 from 90 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.

On to step 8:
If we divide 0 by 45, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 16034.2
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.

Let's proceed to step 9:
The number 45 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 16034.2
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 16034.2 with a remaining 0.0.