54x360+560x64=54x（10x36）+560x64=（54x10）x36+(540+20)x64=540x36+540x64+20x64=540x(36+64)+1280=540x100+1280=54000+1280=55280
50*360+560*60+（360+560）*4=18000+33600+3680=55280
