No problem, we've got 2128 and 9830 to multiply
2128 × 9830 = 9830 × (2128)
+ 9830 × 8 that equals 78640
+ 9830 × 20 what gives us 196600
+ 9830 × 100 resulting in 983000
+ 9830 × 2000 that results in 19660000

= 20918240
