Twin paradox

Dick is 20 20 years old when he takes off on a space voyage at a speed of 0.80 0.80 c c (c c is the speed of light) to a star 20 20 light-years away. His wife Jane, also 20 20 years old, decides to wait for him to come back after successfully completing his mission. Finally, after 30 30 years of voyage in his reference frame, Dick comes back. How old is Jane upon his return?

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