800338 ÷ 66 
Our goal is to divide 800338 by 66.

Advancing to step 1:
The number 66 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 66

Going ahead to step 2:
The number 66 fits into 80 1 times, leaving a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 66 from 80 to get 14.
Take the next digit (0) from the dividend and append it to 14, then repeat: 140 / 66

Moving on to step 3:
66 can be fit into 140 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we subtract 132 from 140, we get 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 66

Advancing to step 4:
The number 66 fits into 83 1 times, leaving a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 121.0
If we subtract 66 from 83, we get 17.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 66

Let's proceed to step 5:
When dividing 173 by 66, we get 2 with a remainder of 41.
Put 2 as the next digit of the answer. 
Result so far: 1212.0
Subtracting 132 from 173 leaves us with 41.
Include the next digit (8) from the dividend after 41, then repeat: 418 / 66

Going ahead to step 6:
66 can be fit into 418 6 times, resulting in a remainder of 22.
Write down 6 as next digit of the result. 
Result so far: 12126.0
Subtract 396 from 418 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 7:
66 goes into 220 3 times with a remainder of 22.
The next digit of our result is 3. 
Result so far: 12126.3
Deduct 198 from 220 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 8:
66 goes into 220 3 times with a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 12126.33
If we take 198 away from 220, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final outcome is 12126.33, with a leftover of 0.022.