Complete the analogy 34 : 19 :: 56 : ? by working out how 19 comes from 34.

Multiply the two digits, then add their total to that product: $3\times 4=12$, 3 + 4 = 7 and 12 + 7 = 19. For 56 this gives $5\times 6=30$, 5 + 6 = 11 and 30 + 11 = 41. The trap 30 is the product on its own, 11 is the total on its own, and 65 is simply 56 written backwards.