We look at the division of 728731 by 45 
Let's see how many times 45 fits into 728731.

Going ahead to step 1:
45 can be fit into 7 0 times, resulting in a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 45

Moving on to step 2:
45 goes into 72 1 times with a remainder of 27.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 45 from 72 to get 27.
Append the next digit (8) from the dividend to 27 and continue with: 278 / 45

On to step 3:
278 divided by 45 is 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtracting 270 from 278 leaves us with 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 45

On to step 4:
If we divide 87 by 45, we get 1 and a remainder of 42.
The number 1 becomes the next digit in our result. 
Result so far: 161.0
If we subtract 45 from 87, we get 42.
Include the next digit (3) from the dividend after 42, then repeat: 423 / 45

On to step 5:
The number 45 fits into 423 9 times, leaving a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 1619.0
Deduct 405 from 423 and we're left with 18.
Append the next digit (1) from the dividend to 18 and continue with: 181 / 45

Advancing to step 6:
The number 45 fits into 181 4 times, leaving a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 16194.0
Deduct 180 from 181 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
If we divide 10 by 45, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 16194.0
Subtract 0 from 10 to 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.

Step 8:
The number 45 fits into 100 2 times, leaving a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 16194.02
Subtracting 90 from 100 leaves us 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.

Advancing to step 9:
45 goes into 100 2 times with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 16194.022
If we take 90 away from 100, 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.

The quotient of the division is 16194.022, and the remainder is 0.001.