420016 divided by 45 
We want to divide 420016 by 45.

On to step 1:
The number 45 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 45

Going ahead to step 2:
The number 45 fits into 42 0 times, leaving a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Grab the next digit (0) from the dividend, add it to 42, then carry on: 420 / 45

Step 3:
The number 45 fits into 420 9 times, leaving a remainder of 15.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 405 from 420, we get 15.
Append the next digit (0) from the dividend to 15 and continue with: 150 / 45

On to step 4:
150 divided by 45 is 3 with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 93.0
If we subtract 135 from 150, we get 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 45

Step 5:
When dividing 151 by 45, we get 3 with a remainder of 16.
The next digit of our result is 3. 
Result so far: 933.0
The remainder is 16 after subtracting 135 from 151.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 45

Step 6:
45 can be fit into 166 3 times, resulting in a remainder of 31.
Put 3 as the next digit of the answer. 
Result so far: 9333.0
Subtracting 135 from 166 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 7:
45 goes into 310 6 times with a remainder of 40.
The number 6 becomes the next digit in our result. 
Result so far: 9333.6
If we subtract 270 from 310, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
45 goes into 400 8 times with a remainder of 40.
The next digit of our result is 8. 
Result so far: 9333.68
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
45 goes into 400 8 times with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 9333.688
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 9333.688 with a remainder of 0.004.