$$Cloud\ Mass\ Density= 6\ mg$$ $$Jeans\ Length=6\ mm$$
$$Jeans\ Mass= 678.24\ mg$$
$$Mj = (π/6) * ρ *λj^3$$
Where,
Mj = Jeans Mass
π = 3.14
ρ = Cloud Mass Density
λj = Jeans Length
A.