We divide 800999 by 45
We're looking to find how many times 45 goes into 800999.

Step 1:
When dividing 8 by 45, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 45

Step 2:
45 can be fit into 80 1 times, resulting in a remainder of 35.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 45 from 80 and we're left with 35.
Include the next digit (0) from the dividend after 35, then repeat: 350 / 45

Step 3:
45 goes into 350 7 times with a remainder of 35.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtracting 315 from 350 leaves us with 35.
Append the next digit (9) from the dividend to 35 and continue with: 359 / 45

On to step 4:
When dividing 359 by 45, we get 7 with a remainder of 44.
Use 7 as the next digit of our solution. 
Result so far: 177.0
Deduct 315 from 359 and we're left with 44.
Bring next digit (9) of the dividend behind the 44 and repeat the process: 449 / 45

Let's proceed to step 5:
If we divide 449 by 45, we get 9 and a remainder of 44.
Put 9 as the next digit of the answer. 
Result so far: 1779.0
The remainder is 44 after subtracting 405 from 449.
Fetch the next digit (9) from the dividend, attach it to 44 and continue: 449 / 45

Advancing to step 6:
449 divided by 45 is 9 with a remainder of 44.
Write down 9 as next digit of the result. 
Result so far: 17799.0
Subtract 405 from 449 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 7:
The number 45 fits into 440 9 times, leaving a remainder of 35.
The next digit of our result is 9. 
Result so far: 17799.9
Subtract 405 from 440 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 8:
45 can be fit into 350 7 times, resulting in a remainder of 35.
Use 7 as the next digit of our solution. 
Result so far: 17799.97
Subtract 315 from 350 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 9:
If we divide 350 by 45, we get 7 and a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 17799.977
The remainder is 35 after subtracting 315 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The quotient of the division is 17799.977, and the remainder is 0.0035.