We look at the division of 124590 by 18 
Let's see how many times 18 fits into 124590.

Advancing to step 1:
1 divided by 18 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 18

Moving on to step 2:
When dividing 12 by 18, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Take the next digit (4) from the dividend and append it to 12, then repeat: 124 / 18

Going ahead to step 3:
18 can be fit into 124 6 times, resulting in a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 108 from 124, we get 16.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 18

Step 4:
18 goes into 165 9 times with a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 69.0
Subtracting 162 from 165 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 18

Moving on to step 5:
39 divided by 18 is 2 with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 692.0
If we subtract 36 from 39, we get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 18

Step 6:
18 can be fit into 30 1 times, resulting in a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 6921.0
The remainder is 12 after subtracting 18 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

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: 6921.6
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.

Advancing to step 8:
When dividing 120 by 18, we get 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 6921.66
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.

The final result is 6921.66 with a remainder of 0.012.