36.8×8.4+14×0.17+38.5×1.6
=36.8×8.4+1.4×1.7+（36.8+1.7）×1.6
=36.8×8.4+1.4×1.7+36.8×1.6+1.7×1.6
=36.8×（8.4+1.6）+1.7×（1.4+1.6）
=36.8×10+1.7×3
=368+5.1
=373.1．