Some equations have been solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
If 45 × 72 = 9, 40 × 51 = 7, then 12 × 40 = ?1
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Some equations have been solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
If 45 × 72 = 9, 40 × 51 = 7, then 12 × 40 = ?