Answer:
687,194,76,736
Explanation:
all u have to do is multiply 4 by 18 times no like this 4x18 cuz that = 72
u gotta do 4x4x4x4x4x4x4x4x4x4x4x4x4x4x4x4x4x4= 687,194,76,736
68719476736
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