Answer
Exact: $23\frac{31}{35}$
Estimate: $24$
Work Step by Step
Exact:
$3\frac{4}{5}\times6\frac{2}{7}$
$=\frac{19}{5}\times\frac{44}{7}$
$=\frac{836}{35}$
$=23\frac{31}{35}$
Estimate:
$3\frac{4}{5}\times6\frac{2}{7}$
$\approx4\times6$
$=24$