The library card of Dalian Development Zone Library has been issued 100 yuan. Could you exchange it for 200 yuan? How can we make him 200?
With my ID card and deposit (divided into 100 yuan and 200 yuan), I can borrow books with my library card and take them out of the library: with a deposit of 100 yuan, I can borrow two books for two months, which can be postponed if I renew them halfway, and 200 yuan can borrow four books. Reading in the museum is free, the environment is orderly and quiet, with heating in winter and air conditioning in summer. 6822