We look at the division of 816209 by 45 
We're looking to find how many times 45 goes into 816209.

Advancing to step 1:
If we divide 8 by 45, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 45

Going ahead to step 2:
45 can be fit into 81 1 times, resulting in a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 45 from 81, we get 36.
Append the next digit (6) from the dividend to 36 and continue with: 366 / 45

Going ahead to step 3:
The number 45 fits into 366 8 times, leaving a remainder of 6.
The next digit of our result is 8. 
Result so far: 18.0
If we subtract 360 from 366, we get 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 45

Moving on to step 4:
When dividing 62 by 45, we get 1 with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 181.0
Deduct 45 from 62 and we're left with 17.
Bring next digit (0) of the dividend behind the 17 and repeat the process: 170 / 45

Let's proceed to step 5:
The number 45 fits into 170 3 times, leaving a remainder of 35.
The next digit of our result is 3. 
Result so far: 1813.0
The remainder is 35 after subtracting 135 from 170.
Append the next digit (9) from the dividend to 35 and continue with: 359 / 45

Step 6:
The number 45 fits into 359 7 times, leaving a remainder of 44.
The next digit of our result is 7. 
Result so far: 18137.0
Subtracting 315 from 359 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

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: 18137.9
If we subtract 405 from 440, we 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.

Moving on to step 8:
The number 45 fits into 350 7 times, leaving a remainder of 35.
The next digit of our result is 7. 
Result so far: 18137.97
Deduct 315 from 350 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 9:
45 goes into 350 7 times with a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 18137.977
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 final outcome is 18137.977, with a leftover of 0.0035.