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!