Alright, let's work through 82905570 times 72064257 step by step
82905570 × 72064257 = 72064257 × (82905570)
+ 72064257 × 0 which equals 0
+ 72064257 × 70 yielding 5044497990
+ 72064257 × 500 that results in 36032128500
+ 72064257 × 5000 which equals 360321285000
+ 72064257 × 00000 producing 0
+ 72064257 × 900000 that results in 64857831300000
+ 72064257 × 2000000 yielding 144128514000000
+ 72064257 × 80000000 giving us 5765140560000000

= 5974528303211490
