Ivermectin: please check my math

Agri-mectin comes in a syringe that dispenses 0.21 ounces of 1.87% Ivermectin. 0.21 ounces is 5.95 grams, or 5950 milligrams. This means there are (5950x0.0187) = 111 milligrams of Ivermectin in the syringe.

The recommended dose is 0.2mg per kg. I weigh 81 kg, so my recommended dose is (0.2x81) = 16mg. Thus, one syringe yields (111/16) = 7 treatments for my body weight.

With a good scale, I need to measure out (5950mg/7) = 850mg for a single treatment. Does this sound about right?