用什么公式可以算出下期和值

简介：Luo Erdeni and Li Ketu were both shocked. They looked up and saw a dozen Ming banners suddenly raised on the Great Wall on the top of the mountain. Countless figures wearing Ming army armor were swaying on the top of the mountain. , some Mongolian soldiers who were lucky enough to climb to the top of the mountain were shot dead by them with random arrows, or were poked down by spears.