(1/2 m) x (1/4 m) x (5/4 m)

To solve this multiplication problem, you simply need to multiply the three fractions together.

(1/2 m) x (1/4 m) x (5/4 m) = (1/2 x 1/4 x 5/4) m x m x m

= (5/32) m^3

Therefore, the final answer is (5/32) m^3.