We divide 404596 by 3
Let's see how many times 3 fits into 404596.

On to step 1:
3 goes into 4 1 times with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 1 after subtracting 3 from 4.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 3

Moving on to step 2:
3 can be fit into 10 3 times, resulting in a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we take 9 away from 10, we end up with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 3

Step 3:
If we divide 14 by 3, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 134.0
If we take 12 away from 14, we end up with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 3

Let's proceed to step 4:
3 can be fit into 25 8 times, resulting in a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 1348.0
If we subtract 24 from 25, we get 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 3

Advancing to step 5:
3 goes into 19 6 times with a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 13486.0
If we take 18 away from 19, we end up with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 3

Moving on to step 6:
16 divided by 3 is 5 with a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 134865.0
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:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 134865.3
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.

Moving on to step 8:
The number 3 fits into 10 3 times, leaving a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 134865.33
If we subtract 9 from 10, we 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.

The final result is 134865.33 with a remainder of 0.001.