We look at the division of 840491 by 1 
Our goal is to divide 840491 by 1.

Going ahead to step 1:
1 can be fit into 8 8 times, resulting in a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 8 from 8 leaves us with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 1

Step 2:
If we divide 4 by 1, we get 4 and a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 84.0
If we subtract 4 from 4, we get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 1

Step 3:
1 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 840.0
If we take 0 away from 0, we end up with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 1

On to step 4:
4 divided by 1 is 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 8404.0
Subtracting 4 from 4 leaves us with 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 1

Advancing to step 5:
1 can be fit into 9 9 times, resulting in a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 84049.0
If we take 9 away from 9, we end up with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 1

Step 6:
1 goes into 1 1 times with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 840491.0
If we take 1 away from 1, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
0 divided by 1 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 840491.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
When dividing 0 by 1, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 840491.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 840491.0, and the remainder is 0.0.