Alright, let's work through 84178738 times 39154998 step by step
84178738 × 39154998 = 39154998 × (84178738)
+ 39154998 × 8 resulting in 313239984
+ 39154998 × 30 that equals 1174649940
+ 39154998 × 700 that equals 27408498600
+ 39154998 × 8000 resulting in 313239984000
+ 39154998 × 70000 giving us 2740849860000
+ 39154998 × 100000 which equals 3915499800000
+ 39154998 × 4000000 giving us 156619992000000
+ 39154998 × 80000000 which equals 3132399840000000

= 3296018318032524
