Converting an int value into a float in a matrix

[K.I.L.E.R]

So my mouse says I’ve clicked on 64, 64. However, the vlaue on the matrix is for example 1.0f, 1.0f.

How do I convert from an int to a float within a matrix?

I’m using LWJGL for my mouse clicks for my level editor to place textures on the matrix where I click.
Thanks.