How many number 7 in a deck of 52 cards?

There are four 7s, which are the 7 of club, 7 of heart, 7 of spade and the 7 of diamond. Each number from 1 to 10 including the Jack, Queen and King have their cards of club, heart, spade and diamond each, which makes 13 (1 to 10 plus J Q and K) x 4 (club, heart, spade and diamond) = 52 cards