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A-4m b-20 cm
p=
o=
a-8dm b-20cm
p=
o=
a-8km b-1200m
p=
o=
a-17cm b24mm
p=
o=
a=14cm b-1dm
p=
o=
a=112cm b=1,12m
p=
o=
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A-4m b-20 cm
a-400cm b-20cm
p=400*20=8000cm^2
o=400*2+20*2=800+40=840cm
a-8dm b-20cm
a-8dm b-2dm
p=8*2=16dm^2
o=2*8+2*2=16+4=20dm
a-8km b-1200m
a-8km b-1,2km
p=8*1,2=9,6km^2
o=2*8+2*1,2=16+2,4=18,4km
a-17cm b24mm
a-17cm b-2,4cm
p=17*2,4=40,8cm^2
o=2*17+2*2,4=34+4,8=38,8cm
a=14cm b-1dm
a-14cm b-10cm
p=14*10=140cm^2
o=2*14+2*10=28+20=48cm
a=112cm b=1,12m
a=112cm b=112cm
p=112*112=12544cm^2
o=4*112=448cm