No problem, we've got 7121 and 2378 to multiply
7121 × 2378 = 2378 × (7121)
+ 2378 × 1 that equals 2378
+ 2378 × 20 producing 47560
+ 2378 × 100 what gives us 237800
+ 2378 × 7000 resulting in 16646000

= 16933738
