No problem, we've got 7172 and 4360 to multiply
7172 × 4360 = 4360 × (7172)
+ 4360 × 2 what gives us 8720
+ 4360 × 70 which equals 305200
+ 4360 × 100 yielding 436000
+ 4360 × 7000 what gives us 30520000

= 31269920
