(1 (meter)())
(1 ()(second))
(1 (meter)(second))
(999 ()())
(1 (mile)(hour))
(1 (kg meter)(second second))
(1 (pound)(acre))
(1 (yard)(foot))
(/ (1 (yard)())(1 (foot)()))
(* (1 (foot pound)()) (5 (meter)(second)))
(/ (1 (foot pound)()) (5 (meter)(second)))

(define a (1 (mile)(hour)))
a
(define b (0.447031923888 (meter) (second)))
b
(/ a b)
(define c (1 (speed_of_light) ()))
(define m (1 (gram)()))
(* m c c)
(/ (* m c c) (1 (joule)()))
(define d (1 (pound)(inch inch)))
d
(/ d (703.0949832833096 (kg) (meter meter)))
(1 (volt)())
(* (8 (mile)(unicycle)) (1 (unicycle)()))