Earlier this year in a drug bust in shanghi, china, police seized 2.4 tons of methamphetamines. if a typical dosage is 50mg, how many doses is that bust, which the chinese police prevented from being sold to the public?

2.4 tons=2.4 tons*(1,000 Kg / 1ton)*(1,000,000 mg / 1 kg)=
=2,400,000,000 mg=2.4 x 10⁹ mg

Now, we solve this problem by the rule of three.

50 mg 1dose
2.4x10⁹ mg    x

x=(2.4 x 10⁹ mg * 1 dose) / 50 mg=48,000,000 doses.

48,000,000 doses