measure the length(4.1) and width(7.1) use the correct number of significant digits to write the perimeter and area

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

if you was gonna solve for a, a is a   < -12

to be honest i don't know but i need points so