We look at the division of 18858 by 18 
We're looking to find how many times 18 goes into 18858.

Step 1:
18 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 18

Let's proceed to step 2:
When dividing 18 by 18, we get 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 18 from 18, we get 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 18

On to step 3:
18 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 18

Step 4:
85 divided by 18 is 4 with a remainder of 13.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
Subtract 72 from 85 to get 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 18

Going ahead to step 5:
The number 18 fits into 138 7 times, leaving a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 1047.0
If we subtract 126 from 138, we 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.

Let's proceed to step 6:
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: 1047.6
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.

Going ahead to step 7:
120 divided by 18 is 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 1047.66
If we take 108 away from 120, we end up 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.

After the division, we end up with 1047.66 and a remainder of 0.012.