How can I align parts to a certain stud grid?

Alright so I'm trying to make a gui button that when clicked, it inserts a model that is moved to the mouse until the player clicks to place it. Everything works so far, but I'm trying to get it to align to a stud grid of 25 studs so that everything is even. The script:

InsertId = 184711756
Player = script.Parent.Parent.Parent.Parent
Mouse = Player:GetMouse()
local Spawn = game.Workspace.Start
Clicked = false
Placed = false

function Insert()
    if Clicked == true then return end
    Clicked = true
    Placed = false
    local InsertedObject = game:GetService("InsertService"):LoadAsset(InsertId)
    InsertedObject.Parent = Player.PlayerGui
    local Search = InsertedObject:GetChildren()
    for i = 1, #Search do
        Search[i].Parent = game.Workspace.Camera
        InsertedObject:Remove()
        InsertedObject = Search[i]
    end
    InsertedObject.PrimaryPart = InsertedObject.Tile
    local SB = Instance.new("SelectionBox", Player.PlayerGui)
    SB.Color = BrickColor.new("Teal")
    SB.Name = "Place"
    SB.Adornee = InsertedObject.Tile
    while Placed == false do
        wait()
        if (Mouse.Hit.p - Player.Character.Torso.Position).magnitude <= 100 then
            if InsertedObject.Tile.Position.Y == Spawn.Position.Y then
                SB.Color = BrickColor.new("Lime green")
            else
                SB.Color = BrickColor.new("Really red") 
            end
            InsertedObject:MoveTo(Vector3.new(Mouse.Hit.p.X+12.5, Spawn.Position.Y, Mouse.Hit.p.Z+12.5))
        else
            SB.Color = BrickColor.new("Really red") 
        end 
    end
end

function Place()
    if Clicked == false then return end
    if Placed == true then return end
    if Player.PlayerGui:findFirstChild("Place") then
        if Player.PlayerGui.Place.ClassName == "SelectionBox" then
            if Player.PlayerGui.Place.Color == BrickColor.new("Lime green") then
                Placed = true
                Clicked = false
                local Search = game.Workspace.Camera:GetChildren()
                for i = 1, #Search do
                    Search[i].Parent = game.Workspace
                end
                Player.PlayerGui.Place:Remove()
            end
        end
    end
end

Mouse.Button1Down:connect(Place)
script.Parent.MouseButton1Click:connect(Insert)