4×8×(25+125)=4x8x25+4x8x125=8x4x25+4x1000=8X100+4000=4800
4×8×(25+125)=4X25X8+4x8X125=100X8+4X1000=800+4000=4800
=4X25X8+4x8X125=100X8+4X1000=800+4000=4800
4*8*(50+100)=32*50+32*100=4800