Respuesta :

[tex]\begin{gathered} 2\frac{1}{4}=\frac{9}{4} \\ 3\frac{1}{2}=\frac{7}{2} \end{gathered}[/tex]

so the area is

[tex]\frac{9}{4}\cdot\frac{7}{2}=\frac{63}{8}=7\frac{7}{8}[/tex]