The first bed is 3 feet long by 3 feet wide so it's 3*3 = <<3*3=9>>9 sq ft
She's building 2 beds that are this size so that's 2*9 = <<2*9=18>>18 sq ft of growing space
The second bed is 4 feet long by 3 feet wide so it's 4*3 = <<4*3=12>>12 sq ft
She's building 2 beds that are this size so that's 2*12 = <<2*12=24>>24 sq ft of growing space
The smaller beds are 18 sq ft and the larger beds are 24 sq ft for a total of 18+24 = <<18+24=42>>42 sq ft of growing space
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