2. Matchbox cars and glass ornaments are certainly items one would not wish to step on, especially while barefoot. If young Kevin leaves 40 glass ornaments on the floor in one room and 30 Matchbox cars on the floor near the staircase, how many more Matchbox cars should he place on the floor so the number of Matchbox cars on the floor is triple the number of ornaments on the floor? ______ Matchbox cars *