We look at the division of 849810 by 20 
We want to figure out the number of times 849810 can be divided by 20.

Going ahead to step 1:
When dividing 8 by 20, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 20

Going ahead to step 2:
When dividing 84 by 20, we get 4 with a remainder of 4.
The next digit of our result is 4. 
Result so far: 4.0
If we take 80 away from 84, we end up with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 20

Advancing to step 3:
20 can be fit into 49 2 times, resulting in a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we subtract 40 from 49, we get 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 20

Moving on to step 4:
If we divide 98 by 20, we get 4 and a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 424.0
If we subtract 80 from 98, we get 18.
Append the next digit (1) from the dividend to 18 and continue with: 181 / 20

Step 5:
20 can be fit into 181 9 times, resulting in a remainder of 1.
The next digit of our result is 9. 
Result so far: 4249.0
Subtract 180 from 181 to get 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 20

Moving on to step 6:
The number 20 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 42490.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
If we divide 100 by 20, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 42490.5
Subtracting 100 from 100 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
0 divided by 20 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 42490.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 42490.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 42490.5, with a leftover of 0.0.