We look at the division of 720690 by 45 
We're looking to find how many times 45 goes into 720690.

On to step 1:
45 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
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 45

On to step 2:
The number 45 fits into 72 1 times, leaving a remainder of 27.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 45 away from 72, we end up with 27.
Bring next digit (0) of the dividend behind the 27 and repeat the process: 270 / 45

On to step 3:
45 can be fit into 270 6 times, resulting in a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Subtracting 270 from 270 leaves us with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 45

Step 4:
The number 45 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 160.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 45

Step 5:
45 can be fit into 69 1 times, resulting in a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 1601.0
If we subtract 45 from 69, we get 24.
Grab the next digit (0) from the dividend, add it to 24, then carry on: 240 / 45

Let's proceed to step 6:
When dividing 240 by 45, we get 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 16015.0
Subtracting 225 from 240 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 7:
45 goes into 150 3 times with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 16015.3
Deduct 135 from 150 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 8:
If we divide 150 by 45, we get 3 and a remainder of 15.
The next digit of our result is 3. 
Result so far: 16015.33
If we take 135 away from 150, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

After the division, we end up with 16015.33 and a remainder of 0.015.