We look at the division of 668428 by 3 
We're looking to find how many times 3 goes into 668428.

On to step 1:
If we divide 6 by 3, we get 2 and a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
If we take 6 away from 6, we end up with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 3

Step 2:
3 can be fit into 6 2 times, resulting in a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Subtracting 6 from 6 leaves us with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 3

Moving on to step 3:
8 divided by 3 is 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 222.0
Subtract 6 from 8 to get 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 3

Advancing to step 4:
3 goes into 24 8 times with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 2228.0
The remainder is 0 after subtracting 24 from 24.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 3

Going ahead to step 5:
2 divided by 3 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 22280.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 3

Let's proceed to step 6:
3 goes into 28 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 222809.0
If we subtract 27 from 28, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
When dividing 10 by 3, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 222809.3
If we subtract 9 from 10, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 8:
3 goes into 10 3 times with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 222809.33
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 222809.33, with a leftover of 0.001.