Answer :
[tex]\begin{gathered} 60mg\to1\text{vitamin} \\ x\to40\text{ vitamins} \\ x=60mg\cdot40 \\ x=2400mg \end{gathered}[/tex][tex]\begin{gathered} 1gr\to1000mg \\ y\to2400mg_{} \\ y=\frac{2400}{1000} \\ y=2.4gr \end{gathered}[/tex]