6.25×8.27×16+3.75×82.7×8
= 6.25×8.27×16+3.75×8.27×80
=( 6.25×16+3.75×80) ×8.27
=(6.25×2×8+37.5×8)×8.27
=(12.5+37.5)×8×8.27
=50×8×8.27
=400×8.27
=4×827
=3308