Relax

Respuesta :

[tex]27.8\approx28\\9.6\approx9.5\\\\27.8\cdot9.6\approx28\cdot9.5=\boxed{266}[/tex]

or

[tex]27.8\approx28\\9.6\approx10\\\\27.8\cdot9.6\approx28\cdot10=\boxed{280}[/tex]