We're dividing 300790 by 18 
We want to figure out the number of times 300790 can be divided by 18.

Going ahead to step 1:
When dividing 3 by 18, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 18

Moving on to step 2:
18 can be fit into 30 1 times, resulting in a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 18 away from 30, we end up with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 18

Going ahead to step 3:
120 divided by 18 is 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtracting 108 from 120 leaves us with 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 18

Advancing to step 4:
The number 18 fits into 127 7 times, leaving a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 167.0
Deduct 126 from 127 and we're left with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 18

Let's proceed to step 5:
The number 18 fits into 19 1 times, leaving a remainder of 1.
The next digit of our result is 1. 
Result so far: 1671.0
If we take 18 away from 19, we end up with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 18

On to step 6:
When dividing 10 by 18, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 16710.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
When dividing 100 by 18, we get 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 16710.5
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 18 is 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 16710.55
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 16710.55 with a remainder of 0.01.