We're dividing 149909 by 3 
We want to figure out the number of times 149909 can be divided by 3.

Going ahead to step 1:
When dividing 1 by 3, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 3

Step 2:
14 divided by 3 is 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 12 from 14 leaves us with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 3

On to step 3:
29 divided by 3 is 9 with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 49.0
Subtracting 27 from 29 leaves us with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 3

Going ahead to step 4:
29 divided by 3 is 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 499.0
If we subtract 27 from 29, we get 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 3

Moving on to step 5:
3 goes into 20 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 4996.0
The remainder is 2 after subtracting 18 from 20.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 3

Moving on to step 6:
29 divided by 3 is 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 49969.0
Subtract 27 from 29 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 49969.6
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
20 divided by 3 is 6 with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 49969.66
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 49969.66, and the remainder is 0.002.