function Calculate_volume(height, angle)
    local r = math.tan(angle) * height
    return 1/3 * math.pi * r^2 * height
end

function Tests()
    -- height, angle
    local cases = {
        { 4.03, 3.55 },
        { 308, 380 },
        { 0.394, 0.826 }
    }

    for i = 1, #cases do
        local case = cases[i]
        local height = case[1]
        local angle = case[2]

        local volume = Calculate_volume(height, angle)

        print(string.format("height: %f, angle: %f, volume: %f", height, angle, volume))
    end
end

Tests()