To find the area, we just have to multiply
[tex]A=5\frac{7}{8}\cdot\frac{18}{4}[/tex]First, transform the mixed number into a fraction
[tex]\begin{gathered} A=\frac{8\cdot5+7}{8}\cdot\frac{18}{4} \\ A=\frac{47}{8}\cdot\frac{18}{4} \\ A=\frac{846}{32} \\ A=26\frac{7}{16} \end{gathered}[/tex]