Let's divide 421566 by 45
Let's see how many times 45 fits into 421566.

Let's proceed to step 1:
4 divided by 45 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 45

Going ahead to step 2:
45 can be fit into 42 0 times, resulting in a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Append the next digit (1) from the dividend to 42 and continue with: 421 / 45

Advancing to step 3:
The number 45 fits into 421 9 times, leaving a remainder of 16.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 16 after subtracting 405 from 421.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 45

On to step 4:
When dividing 165 by 45, we get 3 with a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 93.0
Subtract 135 from 165 to get 30.
Append the next digit (6) from the dividend to 30 and continue with: 306 / 45

Moving on to step 5:
The number 45 fits into 306 6 times, leaving a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 936.0
If we take 270 away from 306, we end up with 36.
Fetch the next digit (6) from the dividend, attach it to 36 and continue: 366 / 45

Moving on to step 6:
366 divided by 45 is 8 with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 9368.0
Deduct 360 from 366 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
If we divide 60 by 45, we get 1 and a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 9368.1
If we subtract 45 from 60, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 8:
45 goes into 150 3 times with a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 9368.13
If we take 135 away from 150, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
The number 45 fits into 150 3 times, leaving a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 9368.133
Subtract 135 from 150 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

After the division, we end up with 9368.133 and a remainder of 0.0015.