Let's divide 561873 by 45
We want to figure out the number of times 561873 can be divided by 45.

Step 1:
The number 45 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 45

Going ahead to step 2:
When dividing 56 by 45, we get 1 with a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 45 from 56 and we're left with 11.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 45

Going ahead to step 3:
If we divide 111 by 45, we get 2 and a remainder of 21.
Write down 2 as next digit of the result. 
Result so far: 12.0
The remainder is 21 after subtracting 90 from 111.
Grab the next digit (8) from the dividend, add it to 21, then carry on: 218 / 45

Going ahead to step 4:
If we divide 218 by 45, we get 4 and a remainder of 38.
The next digit of our result is 4. 
Result so far: 124.0
The remainder is 38 after subtracting 180 from 218.
Fetch the next digit (7) from the dividend, attach it to 38 and continue: 387 / 45

Step 5:
45 can be fit into 387 8 times, resulting in a remainder of 27.
Put 8 as the next digit of the answer. 
Result so far: 1248.0
The remainder is 27 after subtracting 360 from 387.
Take the next digit (3) from the dividend and append it to 27, then repeat: 273 / 45

Going ahead to step 6:
When dividing 273 by 45, we get 6 with a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 12486.0
Subtracting 270 from 273 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
30 divided by 45 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 12486.0
Subtract 0 from 30 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.

Let's proceed to step 8:
45 goes into 300 6 times with a remainder of 30.
The number 6 becomes the next digit in our result. 
Result so far: 12486.06
Deduct 270 from 300 and we're left 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.

Step 9:
45 goes into 300 6 times with a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 12486.066
If we take 270 away from 300, we end up 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.

The final outcome is 12486.066, with a leftover of 0.003.