We're dividing 870543 by 45 
We're looking to find how many times 45 goes into 870543.

Moving on to step 1:
45 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 45

Advancing to step 2:
45 can be fit into 87 1 times, resulting in a remainder of 42.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 45 from 87 leaves us with 42.
Append the next digit (0) from the dividend to 42 and continue with: 420 / 45

Step 3:
When dividing 420 by 45, we get 9 with a remainder of 15.
Write down 9 as next digit of the result. 
Result so far: 19.0
Subtracting 405 from 420 leaves us with 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 45

On to step 4:
45 goes into 155 3 times with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 193.0
Subtracting 135 from 155 leaves us with 20.
Bring next digit (4) of the dividend behind the 20 and repeat the process: 204 / 45

Advancing to step 5:
45 can be fit into 204 4 times, resulting in a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 1934.0
Subtracting 180 from 204 leaves us with 24.
Take the next digit (3) from the dividend and append it to 24, then repeat: 243 / 45

Going ahead to step 6:
When dividing 243 by 45, we get 5 with a remainder of 18.
Put 5 as the next digit of the answer. 
Result so far: 19345.0
Subtract 225 from 243 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 7:
45 goes into 180 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 19345.4
If we subtract 180 from 180, we 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.

Step 8:
0 divided by 45 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 19345.4
Subtracting 0 from 0 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.

Going ahead to step 9:
When dividing 0 by 45, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 19345.4
If we take 0 away from 0, we end up 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.

Our division results in 19345.4 with a remaining 0.0.