No problem, we've got 4364 and 7172 to multiply
4364 × 7172 = 7172 × (4364)
+ 7172 × 4 which equals 28688
+ 7172 × 60 that is equal 430320
+ 7172 × 300 what gives us 2151600
+ 7172 × 4000 yielding 28688000

= 31298608
