No problem, we've got 2439 and 8413 to multiply
2439 × 8413 = 8413 × (2439)
+ 8413 × 9 that equals 75717
+ 8413 × 30 yielding 252390
+ 8413 × 400 that equals 3365200
+ 8413 × 2000 which equals 16826000

= 20519307
