Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown.
I am also not sure what you are asking.
2/3 * 4/5 * m = 1/3
8/15 * m = 1/3
m = 1/3 * 15/8 = 15/24 = 5/8
2/3 x4/5 x m= 1/3
4/5 x 2/3 x m =1/3
2/3 x 4/5 = 1/3 / m
1 answer