Body Surface Area (BSA) is used in physiology and medicine for many clinical purposes. BSA can be modeled by the function
$$
B S A=\sqrt{\frac{w h}{3600}}
$$
where $w$ is weight in kilograms and $h$ is height in centimeters.
Health. The BSA of a 177 -centimeter-tall male is 2.1. Find the weight of the male to the nearest kilogram.