0.155*0.175=0.027125平方米 1m=100cm
0.155*0.175=0.027125
15.5*18-15.5*0.5=16*18-0.5*18-15.5*0.5=2*8*2*9-9-7.75=4*72-16.85=288-16.75=271.25
15.5cm*17.5cm/10000