SAFE area of space-time
Nanofabber that can make a computer of any level, and a transtemporal array
Step One: Frame the question to require the least / sufficiently least temporal bandwidth
Step Two: Make the transtemporal communication array
Step Two-Oh: Receive Answer
Step Three: Fab computer programmed to answer question in an amount of time it is physically capable of running.
Step Four: Use wormhole to place computer, coupled to t-com, in a region of space that will be safe (enough) for the required amount of time. Make sure to account for power-usage!