Cool Multiplication Math Trick

35 × 122

35 = 1, 2, 4, 8, 16, 32, ...

122 = 122, 244, 488, 976, 1952, 3904, ...

35 = 1 + 2 + 32

So, 35 × 122 = 122 + 244 + 3904 = 4270