No problem, we've got 1374 and 6639 to multiply
1374 × 6639 = 6639 × (1374)
+ 6639 × 4 that results in 26556
+ 6639 × 70 what gives us 464730
+ 6639 × 300 producing 1991700
+ 6639 × 1000 that equals 6639000

= 9121986
