No problem, we've got 2907 and 7730 to multiply
2907 × 7730 = 7730 × (2907)
+ 7730 × 7 what gives us 54110
+ 7730 × 00 that equals 0
+ 7730 × 900 resulting in 6957000
+ 7730 × 2000 what gives us 15460000

= 22471110
