Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis. If 94 + 16 = 42, 89 + 23 = 78. then 63 + 45 = ?
$$94+16 = 9 \times 4 + 1 \times 6 = 42$$
$$89+23 = 8 \times 9 + 2 \times 3 = 78$$
$$63+45 = 6 \times 3 + 4 \times 5 = 38$$
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