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2 7/9 x 4 2/5
(2 * 9 + 7)/9 x (4 * 5 + 2)/5
(18 + 7)/9 x (20 + 2)/5
25/9 x 22/5
(25 * 22) / (9 * 5)
550/45
110/9
Respuesta.
110/9