Function rgsl::exponential::exp_mult_err_e10_e

pub fn exp_mult_err_e10_e(
    x: f64, 
    dx: f64, 
    y: f64, 
    dy: f64
) -> (Value, ResultE10)

This routine computes the product y \exp(x) for the quantities x, y with associated absolute errors dx, dy using the gsl_sf_result_e10 type to return a result with extended range.