How Would I Make A 2x Strength Gamepass For This Tool?

So This Is The Tool Script

script.Parent.RemoteEvent.OnServerEvent:Connect(function(plr)
	 
local Strength = game.Players[script.Parent.Parent.Name].leaderstats.Strength
	Strength.Value = Strength.Value +1000   *plr.leaderstats.Life.Value
end)

how would I add a 2x gamepass to this?

thanks for your help!