(100+60+8)*3= 504
1) 100*3= 300
2) 60*3= 180
3) 8*3=24
4) 300 + 180 + 24 = 504
(100+20+9)*6= 774
1) 100 * 6= 600
2) 20 *6= 120
3) 9*6=54
4) 600 + 120 + 54 = 774
(100+90+8)*5= 990
1) 100 * 5 = 500
2) 90 * 5 = 450
3) 8 * 5 = 40
4) 500 + 450 + 40 = 990
(100+10+3)*7 = 791
1) 100 * 7 = 700
2) 10 * 7 = 70
3) 3 * 7 = 21
4) 700 + 70 + 21 = 791