Alright, let's work through 87942049 times 65858516 step by step
87942049 × 65858516 = 65858516 × (87942049)
+ 65858516 × 9 resulting in 592726644
+ 65858516 × 40 that is equal 2634340640
+ 65858516 × 000 that results in 0
+ 65858516 × 2000 that equals 131717032000
+ 65858516 × 40000 producing 2634340640000
+ 65858516 × 900000 that equals 59272664400000
+ 65858516 × 7000000 that is equal 461009612000000
+ 65858516 × 80000000 what gives us 5268681280000000

= 5791732841139284
