Life expectancy expected value

Calculus

$f(x)=\frac{\pi}{14400}x\sin\left(\frac{\pi}{120}x\right),\ \ 0<x<120$

A life insurance actuary estimates the probabilities of $X$ , a person's life expectancy, with the probability density function as described above.

According to this model, what is $\big\lfloor \text{E}[X]\big\rfloor?$