4 4/15 13 1/3 42 2/3 =

Convert all the mixed numbers to improper fractions first:

4 4/15 = (15*4 + 4)/15 = 64/15

13 1/3 = (3*13 + 1)/3 = 40/3

42 2/3 = (3*42 + 2)/3 = 128/3

Now, multiply the fractions:

(64/15) (40/3) (128/3)

= (64 40 128) / (15 3 3)

= 327680 / 135

= 2424

Therefore, 4 4/15 13 1/3 42 2/3 = 2424.