You are currently in a strategy game where you lead your civilization through various eras. Upon reaching the Middle Ages, your civilization's population increased by 20%, resulting in a total population of 240 people. How many inhabitants did your civilization have before the increase? During the Renaissance, the population increased again, this time by 15%. How many inhabitants does your civilization have then? Finally, if diseases decrease the population by 10% during the Industrial Revolution, how many inhabitants remain?

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