This is Tricky Puzzle That Will Totally Blow Your Brain.
Source with answer:
if you answer, do it with an explanation.
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Top $\times$ Bottom = Left $\times$ 10 + Right
I think the answer is
Multiply the top number in the diamond by the bottom number. The result is $10$ times the left number plus the right number.
Multiply Vertical numbers. Divide by 10. Quotient on left, remainder on right.