-- variables
first = {
    {value = 1},
    {value = 2},
    {value = 3}
}
second = {
    {value = 1},
    {value = 2},
    {value = 3}
}
-- params
multi = 3

function compute()
    x = first[1].value
    y = second[1].value
    return (x + y) * multi
end

print(compute())