calculates a rough guess of runtime based on product of parameters

def estimate_complexity(self, x,y,z,n):
        """ 
        calculates a rough guess of runtime based on product of parameters 
        """
        num_calculations = x * y * z * n
        run_time = num_calculations / 100000  # a 2014 PC does about 100k calcs in a second (guess based on prior logs)
        return self.show_time_as_short_string(run_time)