401602 ÷ 3 
Let's see how many times 3 fits into 401602.

Going ahead to step 1:
4 divided by 3 is 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 3 from 4 leaves us with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 3

Going ahead to step 2:
If we divide 10 by 3, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 9 from 10 leaves us with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 3

Moving on to step 3:
If we divide 11 by 3, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 133.0
If we take 9 away from 11, we end up with 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 3

Let's proceed to step 4:
If we divide 26 by 3, we get 8 and a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 1338.0
If we take 24 away from 26, we end up with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 3

Let's proceed to step 5:
If we divide 20 by 3, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 13386.0
Subtracting 18 from 20 leaves us with 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 3

Step 6:
The number 3 fits into 22 7 times, leaving a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 133867.0
The remainder is 1 after subtracting 21 from 22.
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 7:
When dividing 10 by 3, we get 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 133867.3
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.

On to step 8:
3 goes into 10 3 times with a remainder of 1.
The next digit of our result is 3. 
Result so far: 133867.33
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.

After the division, we end up with 133867.33 and a remainder of 0.001.