No problem, we've got 1029 and 7740 to multiply
1029 × 7740 = 7740 × (1029)
+ 7740 × 9 giving us 69660
+ 7740 × 20 producing 154800
+ 7740 × 000 yielding 0
+ 7740 × 1000 which equals 7740000

= 7964460
