Pl plz plz plz! what is the approximate circumference of a pie pan with a diameter of 15.3 inches? (use π = 3.14)

how do you solve this equation? i don't want the answer i just want to know how to solve it, what are the steps?

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)