Alright, let's work through 77107238 times 21551068 step by step
77107238 × 21551068 = 21551068 × (77107238)
+ 21551068 × 8 giving us 172408544
+ 21551068 × 30 resulting in 646532040
+ 21551068 × 200 yielding 4310213600
+ 21551068 × 7000 yielding 150857476000
+ 21551068 × 00000 giving us 0
+ 21551068 × 100000 that is equal 2155106800000
+ 21551068 × 7000000 resulting in 150857476000000
+ 21551068 × 70000000 which equals 1508574760000000

= 1661743329430184
