No problem, we've got 8427820 and 20339866 to multiply
8427820 × 20339866 = 20339866 × (8427820)
+ 20339866 × 0 resulting in 0
+ 20339866 × 20 that is equal 406797320
+ 20339866 × 800 which equals 16271892800
+ 20339866 × 7000 which equals 142379062000
+ 20339866 × 20000 that equals 406797320000
+ 20339866 × 400000 what gives us 8135946400000
+ 20339866 × 8000000 yielding 162718928000000

= 171420729472120
