80 x 400 = 5100: 30 =280 x 60 =2840 : 20 =170 x 50 =6500 : 50 =210x10 =160 x 30 =9000 : 150 =3000 : 250 =150 x 80 =7500: 50 =170 x 30 =1200 : 40 =2760 : 60 =730 x 50 =17 x 200 =140 x 40 =1120 : 80 =730 x 20 =160 x 50 =3900 : 30 =130 x 60 =120 x 90 =1050 : 701400 x 60 =5700 x 30 =1400 x 50 =430 x 70 =340 x 40 =3100 : 20 =7200 : 60 =1360:80 =9870:70 =190 x 30 =6000 : 50 =650 : 130190 x 40 =720 x 60 =5600 : 280​