Alright, let's work through 84154679 times 71644252 step by step
84154679 × 71644252 = 71644252 × (84154679)
+ 71644252 × 9 that results in 644798268
+ 71644252 × 70 yielding 5015097640
+ 71644252 × 600 producing 42986551200
+ 71644252 × 4000 that is equal 286577008000
+ 71644252 × 50000 which equals 3582212600000
+ 71644252 × 100000 yielding 7164425200000
+ 71644252 × 4000000 resulting in 286577008000000
+ 71644252 × 80000000 that equals 5731540160000000

= 6029199029255108
