I know, but that's not "quickly". It's just that time passes slowly for you. "Quickly" would be if my friends and family were still alive and the world were recognizable (and there) by the time I got back.
Try this version instead: There is a rocket to be launched for people to upload problems to solve, the rocket travels in such a way that it is able to solve all the problems and come back to tell people the solution. The way it solves the problem is by orbiting around a tiny planet full of computers devoted to compute the problems they are communicated of. The problem seems to be how to locate the observers.
Edited: time dilation and computation: https://arxiv.org/pdf/0907.1579.pdf