390602 ÷ 18 
We're looking to find how many times 18 goes into 390602.

On to step 1:
When dividing 3 by 18, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 18

Moving on to step 2:
39 divided by 18 is 2 with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 36 from 39 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 18

Let's proceed to step 3:
If we divide 30 by 18, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Subtracting 18 from 30 leaves us with 12.
Include the next digit (6) from the dividend after 12, then repeat: 126 / 18

Step 4:
If we divide 126 by 18, we get 7 and a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 217.0
Deduct 126 from 126 and we're left with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 18

Going ahead to step 5:
18 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2170.0
If we subtract 0 from 0, we get 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 18

Step 6:
18 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 21700.0
Deduct 0 from 2 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
18 can be fit into 20 1 times, resulting in a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 21700.1
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
20 divided by 18 is 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 21700.11
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

In conclusion, the division gives 21700.11 with a balance of 0.002.