We look at the division of 406660 by 20 
Let's see how many times 20 fits into 406660.

Going ahead to step 1:
The number 20 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 20

On to step 2:
When dividing 40 by 20, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 40 from 40 to get 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 20

Advancing to step 3:
6 divided by 20 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we subtract 0 from 6, we get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 20

Step 4:
If we divide 66 by 20, we get 3 and a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 203.0
If we take 60 away from 66, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 20

Moving on to step 5:
20 goes into 66 3 times with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 2033.0
Deduct 60 from 66 and we're left with 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 20

Advancing to step 6:
If we divide 60 by 20, we get 3 and a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 20333.0
Subtracting 60 from 60 leaves us 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:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 20333.0
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.

Let's proceed to step 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20333.0
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 quotient of the division is 20333.0, and the remainder is 0.0.