408840 ÷ 9 
Our goal is to divide 408840 by 9.

Let's proceed to step 1:
4 divided by 9 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 9

Advancing to step 2:
9 can be fit into 40 4 times, resulting in a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 36 away from 40, we end up with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 9

On to step 3:
9 can be fit into 48 5 times, resulting in a remainder of 3.
The next digit of our result is 5. 
Result so far: 45.0
Subtract 45 from 48 to get 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 9

On to step 4:
When dividing 38 by 9, we get 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 454.0
Deduct 36 from 38 and we're left with 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 9

Advancing to step 5:
9 can be fit into 24 2 times, resulting in a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 4542.0
Subtract 18 from 24 to get 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 9

Going ahead to step 6:
60 divided by 9 is 6 with a remainder of 6.
The next digit of our result is 6. 
Result so far: 45426.0
Subtract 54 from 60 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
The number 9 fits into 60 6 times, leaving a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 45426.6
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.

Moving on to step 8:
9 goes into 60 6 times with a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 45426.66
Deduct 54 from 60 and we're left 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 45426.66, and the remainder is 0.006.