8. Divide the following 9 number cards between Xiao Yangyang (2 cards), Mei Yangyang (3 cards), and Big Big Wolf (4 cards). They multiply the numbers on their cards, and Xiao Yangyang gets a result of 56, Mei Yangyang gets a result of 90. Big Big Wolf gets a result of $\qquad$.(6 and 9 cannot be used upside down)
$72$