Convert everything to a common unit, then add. Note that 1 meter = 10 decimeters.
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30
30.66 sq meters You just multiply the two values.
A decimeter is 1/10th of a meter 1 foot =0.3048 meters 1 foot= 3.048 decimeters 3 feet=9.144 decimeters
the answer is 3
The awnser to 70 plus 3 is 73.