题目

阅读理解 For centuries people have hunted animals for food and pleasure.The invention of the gun made it so easy for humans to hunt that some animals were lolled by the thousands and even became extinct（绝种的）.This brings up some serious problems since breaks in the food chain upset the balance of nature. Large animals like tigers are being killed by the hundreds every year in India.The Royal Bengal tiger is the only type that exists in India and their number is greatly reduced every year because of poaching（偷猎）.The present number is about 2,000, all of which live in tiger 服装厂做校服，原来每套用布2.4米，现在每套比原来每套节省用布0.3米，现在做740套校服的布料原来只能做多少套？