?????????????????????
3400,1920
67*21+18*21+85*79=21*(67 +18) +85*79=21*85 + 85*79=85*(21+79)=85*100=8500
88*22+88*2-24*8 =88*(22+2) -24*8=88*24 -24*8=24*(88-8)=24*80=1920
3400,1920
67*21+18*21+85*79=21*(67 +18) +85*79=21*85 + 85*79=85*(21+79)=85*100=8500
88*22+88*2-24*8 =88*(22+2) -24*8=88*24 -24*8=24*(88-8)=24*80=1920