Let's divide 388486 by 3
We want to divide 388486 by 3.

On to step 1:
3 divided by 3 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 0 after subtracting 3 from 3.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 3

Step 2:
3 can be fit into 8 2 times, resulting in a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we subtract 6 from 8, we get 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 3

Going ahead to step 3:
When dividing 28 by 3, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 129.0
If we subtract 27 from 28, we get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 3

Advancing to step 4:
14 divided by 3 is 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 1294.0
Subtract 12 from 14 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 3

Going ahead to step 5:
28 divided by 3 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 12949.0
Subtract 27 from 28 to get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 3

Let's proceed to step 6:
16 divided by 3 is 5 with a remainder of 1.
The next digit of our result is 5. 
Result so far: 129495.0
Deduct 15 from 16 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
10 divided by 3 is 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 129495.3
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 8:
3 can be fit into 10 3 times, resulting in a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 129495.33
Deduct 9 from 10 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Our division results in 129495.33 with a remaining 0.001.