We divide 388539 by 3
We're looking to find how many times 3 goes into 388539.

Step 1:
If we divide 3 by 3, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 3 from 3 to get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 3

On to step 2:
8 divided by 3 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 6 from 8 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

Step 3:
The number 3 fits into 28 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 129.0
Deduct 27 from 28 and we're left with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 3

Going ahead to step 4:
15 divided by 3 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 1295.0
If we subtract 15 from 15, we get 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 3

On to step 5:
If we divide 3 by 3, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 12951.0
If we subtract 3 from 3, we get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 3

Let's proceed to step 6:
3 can be fit into 9 3 times, resulting in a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 129513.0
Subtract 9 from 9 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 129513.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
0 divided by 3 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 129513.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 129513.0, and the remainder is 0.0.