1
(1 (meter) ())
(86400 (second) ())
(1 (meter) (second))
(1 (kg meter) ())
(1 (kg meter) ())
(1 (kg meter) (second))
4
120
1
4
4
$a is 999
999
1998
998001
(999 (meter) ())
(999 (meter) (second))
(999 (meter) (second))
(1 (kg meter) (second second))
(1 (kg meter) (second))
(1/1000 (meter meter) ())
(1/1000 (meter) ())
$x is (1 (kg meter) (second))
(999 (kg meter) (second))