How to make multiplier for attribute?

Hi guys, i need help
I am want to make multiplier for orbs in Orbitiumis(my game), but idk how to make script for attribute
Can who’s help me for problem?

Make an attribute called “Orbs Multiplier” or other if you want to name it differently, then if you have a script that adds Orbs, replace the 1 that adds your Orbs with calculate.

The first calculate will be “1” and the second will be the orbs multiplier.