854491 ÷ 45 
Let's see how many times 45 fits into 854491.

Step 1:
If we divide 8 by 45, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 45

Going ahead to step 2:
45 goes into 85 1 times with a remainder of 40.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 40 after subtracting 45 from 85.
Grab the next digit (4) from the dividend, add it to 40, then carry on: 404 / 45

Going ahead to step 3:
45 can be fit into 404 8 times, resulting in a remainder of 44.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
If we take 360 away from 404, we end up with 44.
Append the next digit (4) from the dividend to 44 and continue with: 444 / 45

Advancing to step 4:
If we divide 444 by 45, we get 9 and a remainder of 39.
Use 9 as the next digit of our solution. 
Result so far: 189.0
The remainder is 39 after subtracting 405 from 444.
Include the next digit (9) from the dividend after 39, then repeat: 399 / 45

Moving on to step 5:
399 divided by 45 is 8 with a remainder of 39.
Write down 8 as next digit of the result. 
Result so far: 1898.0
The remainder is 39 after subtracting 360 from 399.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 45

Advancing to step 6:
When dividing 391 by 45, we get 8 with a remainder of 31.
Put 8 as the next digit of the answer. 
Result so far: 18988.0
The remainder is 31 after subtracting 360 from 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 7:
When dividing 310 by 45, we get 6 with a remainder of 40.
Write down 6 as next digit of the result. 
Result so far: 18988.6
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.

Step 8:
45 can be fit into 400 8 times, resulting in a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 18988.68
If we take 360 away from 400, we end up 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.

Going ahead to step 9:
The number 45 fits into 400 8 times, leaving a remainder of 40.
The next digit of our result is 8. 
Result so far: 18988.688
Deduct 360 from 400 and we're left 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.

The final outcome is 18988.688, with a leftover of 0.004.