log10(Ws) = -5.374+3.191(log10*40) How do you figure out this quesstion

log10(Ws) = -5.374+3.191(log10*40)

 

1*(Ws) = -5.374+3.191(1*40)

 

Ws= -5.374+3.191*40

 

-5.374+3.191*40 = 122.266