21. At the Pirate's Vessel Miniature Golf Park, a life-size mechanical pirate shouts "Ahoy, matey! " once every 6 minutes exactly. A mechanical parrot sitting on the pirates shoulder squawks once every 8 minutes exactly. At 3: 00 p.m., the pirate shouts and the parrot squawks at the same time. What is the next time they will shout and squawk at the same time?