Myrene has twice as many marbles as Mirel while Mirel has thrice as many many marbles as Machel. IF Machel has 8 marbles, how many marbles do the three girls have in all?

Answer:
Machel - 8 marbles
Mirel (x2 of Machel's marbles) - 24
Myrene (x3 of Mirels's marbles) - 48
Total (8+24+48) = 80 marbles

(Is it right?)​