How to increase damage based on leaderstat values?

I want the amount of damage you do to be based on your 'strength' in leaderstats and 'rebirths' which is also in leaderstats

For example if you have 1000 strength you do 1000 damage and if you have 1 rebirth you do double that amount(2k) and if you have 2 rebirths you do 4x that amount(4k)

This is what i have so far

local canDoDmg = false
local dmg = 25 
local db = false

local Plr = game.Players.LocalPlayer
local Stats = Plr:WaitForChild("leaderstats")
local Strength = Stats:FindFirstChild("strength")
local UserInputService = game:GetService("UserInputService")
local Char = Plr.Character or Plr.CharacterAdded:Wait()
local Humanoid = Char:WaitForChild("Humanoid")
local Anim = Instance.new("Animation")
Anim.AnimationId = "rbxassetid://6203475027"
local track = Humanoid:LoadAnimation(Anim)

UserInputService.InputBegan:Connect(function(InputObject)
	if InputObject.UserInputType == Enum.UserInputType.MouseButton1 and db == false then 
		track:Play()
		canDoDmg = true
		db = true
		script.Parent.RightHand.Touched:connect(function(hit)
			if hit.Parent.Humanoid and canDoDmg == true then
				hit.Parent.Humanoid:TakeDamage(dmg*Strength)
			end
		end)
		delay(1, function()
			canDoDmg = false
			db = false
		end)
		wait(10)
	end
end)

i got this error on line 22 attempt to perform arithmetic (mul) on number and Instance 

On line 22 you are multiplying dmg which is 25, a number, with Strength which is IntValue i assume, you need to turn it into a number, in this case just get it's value and change it to hit.Parent.Humanoid:TakeDamage(dmg*Strength.Value).

You also said you want to be it multiplied by 2 every rebirth so you can fix that using for loop, from your script i assume you know how they work:

...
db = true

script.Parent.RightHand.Touched:connect(function(hit)
	if hit.Parent.Humanoid and canDoDmg == true then
		local TotalDamage = Strength.Value -- default value with 0 rebirths

		for i = 1, dmg do
			TotalDamage *= 2
		end

		hit.Parent.Humanoid:TakeDamage(TotalDamage)
	end
end)
...

I am not sure if dmg stands for rebirths or Strength.Value but if you get how it works, you can make it work.

I suppose you already have a damage script. This is my guess:

local damage = -- put your damage here

game.Players.PlayerAdded:Connect(function(player)
	local strength = player.leaderstats.Strength.Value
	local rebirth = player.leaderstats.Rebirth.Value

	player.damage = strength * rebirth
end)