Alright, let's work through 87257442 times 71188537 step by step
87257442 × 71188537 = 71188537 × (87257442)
+ 71188537 × 2 which equals 142377074
+ 71188537 × 40 that equals 2847541480
+ 71188537 × 400 which equals 28475414800
+ 71188537 × 7000 what gives us 498319759000
+ 71188537 × 50000 giving us 3559426850000
+ 71188537 × 200000 that is equal 14237707400000
+ 71188537 × 7000000 yielding 498319759000000
+ 71188537 × 80000000 producing 5695082960000000

= 6211729638342354
