We look at the division of 308666 by 30 
We want to figure out the number of times 308666 can be divided by 30.

On to step 1:
If we divide 3 by 30, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 30

Advancing to step 2:
30 divided by 30 is 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 30 from 30, we get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 30

Moving on to step 3:
8 divided by 30 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtract 0 from 8 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 30

Step 4:
If we divide 86 by 30, we get 2 and a remainder of 26.
Use 2 as the next digit of our solution. 
Result so far: 102.0
Subtract 60 from 86 to get 26.
Grab the next digit (6) from the dividend, add it to 26, then carry on: 266 / 30

Moving on to step 5:
266 divided by 30 is 8 with a remainder of 26.
Record the quotient 8 as the next digit in the result. 
Result so far: 1028.0
Deduct 240 from 266 and we're left with 26.
Grab the next digit (6) from the dividend, add it to 26, then carry on: 266 / 30

On to step 6:
30 can be fit into 266 8 times, resulting in a remainder of 26.
The number 8 becomes the next digit in our result. 
Result so far: 10288.0
Deduct 240 from 266 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 7:
30 can be fit into 260 8 times, resulting in a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 10288.8
Subtracting 240 from 260 leaves us 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.

Going ahead to step 8:
When dividing 200 by 30, we get 6 with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 10288.86
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.

Step 9:
When dividing 200 by 30, we get 6 with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 10288.866
Deduct 180 from 200 and we're left 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.

The final outcome is 10288.866, with a leftover of 0.002.