We look at the division of 420290 by 4 
We want to divide 420290 by 4.

Going ahead to step 1:
If we divide 4 by 4, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 4 from 4, we get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 4

Moving on to step 2:
If we divide 2 by 4, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 2, we end up with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 4

Advancing to step 3:
The number 4 fits into 20 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 105.0
Subtract 20 from 20 to get 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 4

On to step 4:
If we divide 2 by 4, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 1050.0
If we subtract 0 from 2, we get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 4

On to step 5:
4 can be fit into 29 7 times, resulting in a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 10507.0
Deduct 28 from 29 and we're left with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 4

Going ahead to step 6:
4 goes into 10 2 times with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 105072.0
Subtracting 8 from 10 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
If we divide 20 by 4, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 105072.5
If we subtract 20 from 20, 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.

Moving on to step 8:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 105072.5
The remainder is 0 after subtracting 0 from 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 9:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 105072.5
Deduct 0 from 0 and we're left 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.

The quotient of the division is 105072.5, and the remainder is 0.0.