Let's first convert the mixed numbers to improper fractions:

7 1/2 = (2*7 + 1)/2 = 15/2

5 1/6 = (6*5 + 1)/6 = 31/6

3 3/7 = (7*3 + 3)/7 = 24/7

7 1/3 = (3*7 + 1)/3 = 22/3

Now, let's multiply the fractions:

(15/2) (4/15) = (154) / (2*15) = 60 / 30 = 2

(31/6) (22/7) = (3122) / (6*7) = 682 / 42 = 341 / 21 = 16 5/21

(24/7) (3/1) = (243) / (7*1) = 72 / 7

(22/3) (2/11) = (222) / (3*11) = 44 / 33 = 4/3

Therefore, the results of the multiplications are:

7 1/2 * 2 4/15 = 2

5 1/6 * 3 1/7 = 16 5/21

3 3/7 * 2 1/3 = 72/7

7 1/3 * 2 2/11 = 4/3