No problem, we've got 80384843 and 18509416 to multiply
80384843 × 18509416 = 18509416 × (80384843)
+ 18509416 × 3 yielding 55528248
+ 18509416 × 40 that equals 740376640
+ 18509416 × 800 resulting in 14807532800
+ 18509416 × 4000 producing 74037664000
+ 18509416 × 80000 that is equal 1480753280000
+ 18509416 × 300000 producing 5552824800000
+ 18509416 × 0000000 what gives us 0
+ 18509416 × 80000000 which equals 1480753280000000

= 1487876499181688
