621342 ÷ 18 
Our goal is to divide 621342 by 18.

Let's proceed to step 1:
18 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 18

Going ahead to step 2:
The number 18 fits into 62 3 times, leaving a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 54 from 62 and we're left with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 18

On to step 3:
18 can be fit into 81 4 times, resulting in a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 34.0
If we subtract 72 from 81, we get 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 18

Let's proceed to step 4:
The number 18 fits into 93 5 times, leaving a remainder of 3.
The next digit of our result is 5. 
Result so far: 345.0
Subtract 90 from 93 to get 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 18

Advancing to step 5:
If we divide 34 by 18, we get 1 and a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 3451.0
Subtract 18 from 34 to get 16.
Take the next digit (2) from the dividend and append it to 16, then repeat: 162 / 18

Advancing to step 6:
The number 18 fits into 162 9 times, leaving a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 34519.0
If we take 162 away from 162, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
18 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 34519.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
0 divided by 18 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 34519.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 34519.0 with a balance of 0.0.