Alright, let's work through 83400156 times 84767115 step by step
83400156 × 84767115 = 84767115 × (83400156)
+ 84767115 × 6 that equals 508602690
+ 84767115 × 50 resulting in 4238355750
+ 84767115 × 100 that results in 8476711500
+ 84767115 × 0000 resulting in 0
+ 84767115 × 00000 what gives us 0
+ 84767115 × 400000 yielding 33906846000000
+ 84767115 × 3000000 yielding 254301345000000
+ 84767115 × 80000000 resulting in 6781369200000000

= 7069590614669940
