No problem, we've got 2870 and 7209 to multiply
2870 × 7209 = 7209 × (2870)
+ 7209 × 0 what gives us 0
+ 7209 × 70 giving us 504630
+ 7209 × 800 that results in 5767200
+ 7209 × 2000 yielding 14418000

= 20689830
