Restaurant Brands International Inc., owner of the Burger King and Tim Hortons fast-food chains, said on Tuesday it would acquire Popeyes Louisiana Kitchen for $1.8 billion in cash.The deal is a bet by Oakville, Ontario-based Restaurant Brands that it can use its international reach to introduce Popeyes’ Louisiana-style fried chicken and buttermilk biscuits to more diners globally.Popeyes shareholders will get $79 for each share they hold, a 19.5 percent premium to the stock’s Friday close.Popeyes, whose fans include pop singer Beyoncé, began 45 years ago as a Southern-fried “Chicken on the Run” restaurant in a New Orleans suburb.