872839 divided by 45 
Our goal is to divide 872839 by 45.

Let's proceed to step 1:
If we divide 8 by 45, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 45

Going ahead to step 2:
The number 45 fits into 87 1 times, leaving a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 45 from 87 to get 42.
Take the next digit (2) from the dividend and append it to 42, then repeat: 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
If we subtract 405 from 422, we get 17.
Grab the next digit (8) from the dividend, add it to 17, then carry on: 178 / 45

Going ahead to step 4:
45 can be fit into 178 3 times, resulting in a remainder of 43.
Put 3 as the next digit of the answer. 
Result so far: 193.0
The remainder is 43 after subtracting 135 from 178.
Append the next digit (3) from the dividend to 43 and continue with: 433 / 45

Let's proceed to step 5:
45 goes into 433 9 times with a remainder of 28.
Record the quotient 9 as the next digit in the result. 
Result so far: 1939.0
The remainder is 28 after subtracting 405 from 433.
Bring next digit (9) of the dividend behind the 28 and repeat the process: 289 / 45

Going ahead to step 6:
If we divide 289 by 45, we get 6 and a remainder of 19.
Write down 6 as next digit of the result. 
Result so far: 19396.0
If we subtract 270 from 289, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 7:
When dividing 190 by 45, we get 4 with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 19396.4
If we take 180 away from 190, 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.

Moving on to step 8:
When dividing 100 by 45, we get 2 with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 19396.42
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.

Step 9:
45 goes into 100 2 times with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 19396.422
Subtract 90 from 100 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.

Our division results in 19396.422 with a remaining 0.001.