We look at the division of 400420 by 2 
Our goal is to divide 400420 by 2.

On to step 1:
When dividing 4 by 2, we get 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 4 away from 4, we end up with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 2

On to step 2:
2 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Deduct 0 from 0 and we're left with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 2

Let's proceed to step 3:
2 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 200.0
Subtracting 0 from 0 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 2

Advancing to step 4:
2 goes into 4 2 times with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2002.0
Subtract 4 from 4 to get 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 2

Going ahead to step 5:
The number 2 fits into 2 1 times, leaving a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 20021.0
The remainder is 0 after subtracting 2 from 2.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 2

Going ahead to step 6:
If we divide 0 by 2, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 200210.0
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.

Moving on to step 7:
2 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 200210.0
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.

On to step 8:
0 divided by 2 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 200210.0
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.

The final result is 200210.0 with a remainder of 0.0.