20//6=3 how

Answer 1

Using the division operator // removes the part after decimal point, ie it converts the float into an integer.

So if we use / we get 3.33

Answer 2

Because 6 divides into 20, 3 times. Since it's integer division, it 'must' return an integer value.

6, 12, 18

Imagine asking the question: How many times can you fit 6 under the value 20? You'd answer: 3 times. Since 3 times 6 is 18. It technically removes the decimal.

Answer 3

It outputs the quotient, not the remainder. Quotient is a fancy word for the number before the decimal. If you want the remainder as well as the quotient(decimal) you would do...
>>>20/6
3.33333

Answer 4

If I am not wrong, this division is called the floor division. You can look it up in wiki for a better explanation.