Answer
$7\frac{7}{10}$
Work Step by Step
$2\frac{1}{5}\times3\frac{1}{2}$ $\longrightarrow$convert mixed numbers
=$\frac{11}{5}\times\frac{7}{2}$ $\longrightarrow$multiply numerators and denominators
=$\frac{11\times7}{5\times2}$
=$\frac{77}{10}$
=$7\frac{7}{10}$