21 square feet
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The area of a parallelogram is calculated by multiplying the length of the base by the height. In this case, the base is 3 feet and the height is 7 feet. Therefore, the area of the parallelogram is 3 feet * 7 feet = 21 square feet.
21
A rectangular spacemeasuring 3 ft by 4 ft has an area of 3 x 4 = 12 ft2
63 cm2
7 x 3 ie 21 sqyds
There are 3 feet in one yard. Therefore, 7 feet is equal to 7/3 = 2.3 recurring (that is, 2.3333...) yards.