We look at the division of 668939 by 30 
We want to divide 668939 by 30.

Going ahead to step 1:
The number 30 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 30

Moving on to step 2:
30 can be fit into 66 2 times, resulting in a remainder of 6.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 60 from 66 and we're left with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 30

Moving on to step 3:
If we divide 68 by 30, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we take 60 away from 68, we end up with 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 30

Step 4:
The number 30 fits into 89 2 times, leaving a remainder of 29.
Use 2 as the next digit of our solution. 
Result so far: 222.0
Subtracting 60 from 89 leaves us with 29.
Append the next digit (3) from the dividend to 29 and continue with: 293 / 30

Advancing to step 5:
30 can be fit into 293 9 times, resulting in a remainder of 23.
Put 9 as the next digit of the answer. 
Result so far: 2229.0
The remainder is 23 after subtracting 270 from 293.
Append the next digit (9) from the dividend to 23 and continue with: 239 / 30

On to step 6:
30 can be fit into 239 7 times, resulting in a remainder of 29.
Use 7 as the next digit of our solution. 
Result so far: 22297.0
If we take 210 away from 239, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 7:
30 goes into 290 9 times with a remainder of 20.
Use 9 as the next digit of our solution. 
Result so far: 22297.9
The remainder is 20 after subtracting 270 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
If we divide 200 by 30, we get 6 and a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 22297.96
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
200 divided by 30 is 6 with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 22297.966
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 22297.966, with a leftover of 0.002.