63
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24.5 cm sq
Well, darling, to find the area of a rectangle, you simply multiply the length by the width. So, for a 7cm by 9cm rectangle, the area would be 63 square centimeters. Easy peasy lemon squeezy!
The area for a 7cm by 8cm is 56.
It is: 4*7 = 28 square cm
24.5 cm2 - Simply multiply the two known values together !