体积=长*宽*高=(3/5)*(1/4)*(7/10)=21/200=0.105(m³)
表面积=2(长*宽+长*高+高*宽)
=2[(3/5)*(1/4)+(3/5)*(7/10)+(1/4)*(7/10)]
=1.49(m²)