888×9+777×4
=(800+80+8)×9+(700+70+7)×4
=800×9+80×9+8×9+700×4+70×4+7×4
=7200+720+72+2800+280+28
=7992+3108
=10100那这样更简便:111×7×4+111×8×9=111×28+111×72=111×100=11100好了，不过也谢谢了！