Placing a question mark at the end of a list of expressions or numbers does not make it a sensible question. Try to use a whole sentence to describe what it is that you want answered.
567
123
234
123, 234, 345, 456, 567, 678 sorry if this wasn't what you were looking for but consecutive numbers are just numbers that come next to each other there isn't really a pattern.
345 x 456 = 157320
456 - 234 = 222
234 x 345 = 80,730
Your 123 x 456 = 56,088
123 x 456 = 56,088
123 + 456 = 579
234 x 123 = 28782
468
123 + 345 = 468