0.7777×0.7+0.1111×5.1
=0.1111×7×0.7+0.1111×5.1
=0.1111×4.9+0.1111×5.1
=0.1111×（4.9+5.1）
=0.1111×10
=1.111你真棒！呵呵，过奖！