A worker in a factory earns $10 an hour. The worker works 10 hours a day for 10 days straight before a vacation.how much money did the worker earn before going on vacation?
The worker earns $10 an hour and works 10 hours a day, so the worker earns 10 * $10 = $<<10*10=100>>100 per day.
The worker works for 10 days, so the worker earns 10 * $100 = $<<10*100=1000>>1000 before going on vacation. Answer: \boxed{1000}.