Alright, let's work through 82071124 times 81665499 step by step
82071124 × 81665499 = 81665499 × (82071124)
+ 81665499 × 4 that results in 326661996
+ 81665499 × 20 that is equal 1633309980
+ 81665499 × 100 that results in 8166549900
+ 81665499 × 1000 what gives us 81665499000
+ 81665499 × 70000 yielding 5716584930000
+ 81665499 × 000000 that is equal 0
+ 81665499 × 2000000 that is equal 163330998000000
+ 81665499 × 80000000 that results in 6533239920000000

= 6702379294950876
