How would I start a script to convert a Value to another Value?

{Information}
So I want to know how to start a script to convert Value1 to another named Value2 when Value1 has a value of 50 then it will automatically convert it to a value of 2 for Value2, Basically the Values are the String Values in the leaderstats folder. For example, Value1 will be called EXP or XP and Value2 will be called Levels/Ranks. So how would I automatically convert 50 EXP/XP to 1 Level/Rank? Basically a level-up system, and how would I make the EXP/XP needed to Level/Rank up multiply by 2?

{Scripts}
LeaderStats(Works(Script)

local DataStoreService = game:GetService("DataStoreService")
	 
local myDataStore = DataStoreService:GetDataStore("myDataStore")
	 
game.Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player
	 
	local Levels = Instance.new("IntValue")
	Levels.Name = "Levels"
	Levels.Parent = leaderstats
	Levels.Value = 1
	
	local Kills = Instance.new("IntValue")
	Kills.Name = "Kills"
	Kills.Parent = leaderstats
	Kills.Value = 0
	
	local Gems = Instance.new("IntValue")
	Gems.Name = "Gems"
	Gems.Parent = leaderstats
	Gems.Value = 50
	
	local EXP = Instance.new("IntValue")
	EXP.Name = "EXP"
	EXP.Parent = leaderstats
	EXP.Value = 0
	
	local data
	local success, errormessage = pcall(function()
	    data = myDataStore:GetAsync(player.UserId.."-Levels")
	    data = myDataStore:GetAsync(player.UserId.."-Kills")
	    data = myDataStore:GetAsync(player.UserId.."-Gems")
	    data = myDataStore:GetAsync(player.UserId.."-EXP")
	end)
	 
	if success then
	    Levels.Value = data
	    Kills.Value = data
        Gems.Value = data
        EXP.Value = data
	else
	    print("There was a error whilst getting your data")
	    warn(errormessage)
	end
end)
	 
game.Players.PlayerRemoving:Connect(function(player)
	 
	local success, errormessage = pcall(function()
	    myDataStore:SetAsync(player.UserId.."-Levels",player.leaderstats.Levels.Value)
		myDataStore:SetAsync(player.UserId.."-Kills",player.leaderstats.Kills.Value)
		myDataStore:SetAsync(player.UserId.."-Gems",player.leaderstats.Gems.Value)
		myDataStore:SetAsync(player.UserId.."-EXP",player.leaderstats.EXP.Value)
	end)
	 
	if success then
	    print("Player Data successfully saved!")
	else
	    print("There was a error when saving data")
	    warn(errormessage)
	 end
	 
end)

Converter(Does not work(Script)

local Level = game.Players.LocalPlayer.leaderstats.Levels.Value
local EXP = game.Players.LocalPlayer.leaderstats.EXP.Value

if game.Players.LocalPlayer.leaderstats.EXP == "50" then
	game.Players.LocalPlayer.leaderstats.EXP -50
	game.Players.LocalPlayer.leaderstats.Level +1
end

If anybody could help me start off my script I would really appreciate it!

local Level = game.Players.LocalPlayer.leaderstats.Levels.Value

if game.Players.LocalPlayer.leaderstats.EXP.Value == "50" then
    game.Players.LocalPlayer.leaderstats.EXP.Value -50
    game.Players.LocalPlayer.leaderstats.Levels.Value +1 --.Value
end

Try this...