(math/floor-div 5 3)
(math/floor-div -5 3)
(math/floor-div 5 -3)
(math/floor-div -5 -3)
(math/floor-div 9223372036854775807 1)
(math/floor-div -9223372036854775808 1)
(math/floor-div 5.9 2.1)
(math/floor-div -5.9 2.1)