We're dividing 150581 by 3 
Let's see how many times 3 fits into 150581.

Advancing to step 1:
When dividing 1 by 3, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 3

Step 2:
The number 3 fits into 15 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 15 from 15 to get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 3

Moving on to step 3:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 50.0
Deduct 0 from 0 and we're left with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 3

Going ahead to step 4:
When dividing 5 by 3, we get 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 501.0
Subtracting 3 from 5 leaves us with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 3

Going ahead to step 5:
3 can be fit into 28 9 times, resulting in a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 5019.0
The remainder is 1 after subtracting 27 from 28.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 3

Advancing to step 6:
If we divide 11 by 3, we get 3 and a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 50193.0
Deduct 9 from 11 and we're left 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.

Moving on to step 7:
If we divide 20 by 3, we get 6 and a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 50193.6
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
When dividing 20 by 3, we get 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 50193.66
If we take 18 away from 20, we end up 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.

Our division results in 50193.66 with a remaining 0.002.