No problem, we've got 98784390 and 42920087 to multiply
98784390 × 42920087 = 42920087 × (98784390)
+ 42920087 × 0 what gives us 0
+ 42920087 × 90 that is equal 3862807830
+ 42920087 × 300 giving us 12876026100
+ 42920087 × 4000 which equals 171680348000
+ 42920087 × 80000 that equals 3433606960000
+ 42920087 × 700000 resulting in 30044060900000
+ 42920087 × 8000000 that equals 343360696000000
+ 42920087 × 90000000 producing 3862807830000000

= 4239834613041930
