Is there a way to round positions on roblox? *Edited*

So I'm working on a build tool and this is what I have:

function cloneWood(hitTarget)
    local cloneTemp = game.Workspace.WoodBlock1
    local clonedWood = cloneTemp:Clone()
    clonedWood.Position = hitTarget
    clonedWood.Parent = game.Workspace
end
local tool = script.Parent
tool.Equipped:connect(function(Mouse)
    Mouse.Button1Down:connect(function()
        local hitTarget = Mouse.Hit
        cloneWood(Mouse.Hit.p) --once again, mouse.Hit.p or just set the CFrame
    end)
end)

So I would like to round the position it is placed to the nearest whole number and I tried implementing this:

function round(num,multiple)
    if num%multiple==0 then
        return num
    elseif num%multiple>multiple/2 then
        i = 0
        repeat i = i+1 until (i*multiple>num)
        return i*multiple
    elseif num%multiple<((multiple/2)+.5) then
        i = 0
        repeat i = i+1 until (i*multiple>num)
        return ((i*multiple)-multiple)
    end
end

But it does nothing, is there a simpler way to round? Edit:

local rounded = math.floor(number + .5)

I tried math.floor into a position but it said thats a number value, not a vector3

I tried implementing the answer like so:

function RoundNumber(Input) -- Input is whatever number you want to round
    local StringForm = tostring(Input)
    local PlacementOfDecimal = string.find(StringForm, ".")
    if tonumber(string.sub(StringForm, PlacementOfDecimal+1 ,PlacementOfDecimal+1)) >= 5 then
        return (tonumber(string.sub(StringForm, 0,  PlacementOfDecimal))) + 1
    elseif tonumber(string.sub(StringForm, PlacementOfDecimal+1 ,PlacementOfDecimal+1))<5 then
        return (tonumber(string.sub(StringForm, 0,  PlacementOfDecimal)))
    end
end

function cloneWood(hitTarget)
    local cloneTemp = game.Workspace.WoodBlock1
    local clonedWood = cloneTemp:Clone()
    clonedWood.Position = hitTarget
    clonedWood.Parent = game.Workspace
end
local tool = script.Parent
tool.Equipped:connect(function(Mouse)
    Mouse.Button1Down:connect(function()
        local hitTarget = Mouse.Hit
        local newTarg = RoundNumber(hitTarget)
        print(newTarg)
        cloneWood(newTarg) --once again, mouse.Hit.p or just set the CFrame
    end)
end)

I just get an error saying it expected a Vector3 and got a number