Alright, let's work through 82216542 times 84836642 step by step
82216542 × 84836642 = 84836642 × (82216542)
+ 84836642 × 2 that is equal 169673284
+ 84836642 × 40 that equals 3393465680
+ 84836642 × 500 yielding 42418321000
+ 84836642 × 6000 which equals 509019852000
+ 84836642 × 10000 that results in 848366420000
+ 84836642 × 200000 yielding 16967328400000
+ 84836642 × 2000000 resulting in 169673284000000
+ 84836642 × 80000000 giving us 6786931360000000

= 6974975340131964
