We look at the division of 872490 by 45 
Let's see how many times 45 fits into 872490.

Advancing to step 1:
When dividing 8 by 45, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 45

Moving on to step 2:
The number 45 fits into 87 1 times, leaving a remainder of 42.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 45 from 87, we get 42.
Grab the next digit (2) from the dividend, add it to 42, then carry on: 422 / 45

Moving on to step 3:
The number 45 fits into 422 9 times, leaving a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Deduct 405 from 422 and we're left with 17.
Bring next digit (4) of the dividend behind the 17 and repeat the process: 174 / 45

Let's proceed to step 4:
When dividing 174 by 45, we get 3 with a remainder of 39.
Record the quotient 3 as the next digit in the result. 
Result so far: 193.0
The remainder is 39 after subtracting 135 from 174.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 45

Going ahead to step 5:
45 goes into 399 8 times with a remainder of 39.
Write down 8 as next digit of the result. 
Result so far: 1938.0
If we subtract 360 from 399, we get 39.
Take the next digit (0) from the dividend and append it to 39, then repeat: 390 / 45

Let's proceed to step 6:
The number 45 fits into 390 8 times, leaving a remainder of 30.
The next digit of our result is 8. 
Result so far: 19388.0
Subtracting 360 from 390 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 7:
If we divide 300 by 45, we get 6 and a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 19388.6
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
45 can be fit into 300 6 times, resulting in a remainder of 30.
The next digit of our result is 6. 
Result so far: 19388.66
Subtract 270 from 300 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 19388.66 and a remainder of 0.03.