取PI＝3.141。已知：2*S1 = 314平米2。已知：2*S2 = 2*(H*2R) = 160 -> S2 = 2HR = 80平米3。求原圆柱形表面积：S3 = 2*S1+S4 = 2*S1+(PI*2R)*H = 2*S1+ PI*S2 = 314+3.14*80 = 565.2平米
