On the Subject of Destabilized Numbers

Why do they keep greenlighting broken modules?

For those who are familiar with the original manual.

Displayed numbers are generated via the following:

Curr = Prev op Const + Off, where

• Curr is the current displayed number
• Prev is previous displayed number
• Const is a fixed number between 0 and 500 inclusive
• Off is a random number between -100 and 100 inclusive and has a 50% chance to be absent
• op is + or *
• Curr has a 50% chance to have a digit glitched
• Curr's glitch and Off's absence have no correlation

Find and submit what the next Curr is supposed to be assuming Off is absent.