To serve 350 students, you would need 350 servings. Each surving is 125g, so in total you would need
350 x 125 = 43,750g
43,750g is 43.75 kg. The cafeteria has 10 5-kg cans, so the cafeteria has
10 x 5 = 50 kg
50 is higher than 43.75, so the cafeteria will have enough to serve 350 students.