We look at the division of 158790 by 18 
Let's see how many times 18 fits into 158790.

Moving on to step 1:
When dividing 1 by 18, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 18

Step 2:
18 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 18

Moving on to step 3:
158 divided by 18 is 8 with a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we take 144 away from 158, we end up with 14.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 18

Let's proceed to step 4:
If we divide 147 by 18, we get 8 and a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 88.0
If we take 144 away from 147, we end up with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 18

Going ahead to step 5:
If we divide 39 by 18, we get 2 and a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 882.0
The remainder is 3 after subtracting 36 from 39.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 18

Moving on to step 6:
When dividing 30 by 18, we get 1 with a remainder of 12.
The next digit of our result is 1. 
Result so far: 8821.0
Subtract 18 from 30 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
When dividing 120 by 18, we get 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 8821.6
Deduct 108 from 120 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
If we divide 120 by 18, we get 6 and a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 8821.66
Subtract 108 from 120 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 8821.66, with a leftover of 0.012.