We divide 406401 by 9
We want to divide 406401 by 9.

Going ahead to step 1:
9 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 9

Going ahead to step 2:
40 divided by 9 is 4 with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 36 from 40, we get 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 9

Moving on to step 3:
When dividing 46 by 9, we get 5 with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 45.0
The remainder is 1 after subtracting 45 from 46.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 9

Let's proceed to step 4:
14 divided by 9 is 1 with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 451.0
The remainder is 5 after subtracting 9 from 14.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 9

Step 5:
50 divided by 9 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 4515.0
The remainder is 5 after subtracting 45 from 50.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 9

Moving on to step 6:
9 can be fit into 51 5 times, resulting in a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 45155.0
If we take 45 away from 51, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
If we divide 60 by 9, we get 6 and a remainder of 6.
The next digit of our result is 6. 
Result so far: 45155.6
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
If we divide 60 by 9, we get 6 and a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 45155.66
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The quotient of the division is 45155.66, and the remainder is 0.006.