(g/day)*(ug/kg)*(kg.day/mg)/

Question

kg

Answer 1

(g/day)*(ug/kg)*(kg.day/mg)/kg
= g*ug/(mg*kg)
= (g/mg)*(ug/kg)= 10^3*10^-9 = 10^-6

Answer 2

(11.38 g/day)*(2.82ug/kg)*(17.5kg-day/mg)/20kg

= 0.000000002808015
What would be the symbol after the number g/kg, ug/kg? I have no clue

Please help