daca am inteles bine, peretele are 8,5 m pe 2 m, adica[tex]8,5m=85dm \\ 2m=20dm \\ ariaperete=85*20=1700 dm^{2} \\ ariaplaca=1*1=1dm^{2} \\ suntnecesare1700placi \\1700placi:50placi/cutie=34cutii \\ totalfaianta=1700 dm^{2}=17m^{2} \\ 1 m^{2} =63500lei;17m^{2} =17*63500=1079500lei \\ [/tex]
