Alright, let's work through 87994086 times 77598257 step by step
87994086 × 77598257 = 77598257 × (87994086)
+ 77598257 × 6 that results in 465589542
+ 77598257 × 80 what gives us 6207860560
+ 77598257 × 000 resulting in 0
+ 77598257 × 4000 producing 310393028000
+ 77598257 × 90000 which equals 6983843130000
+ 77598257 × 900000 which equals 69838431300000
+ 77598257 × 7000000 giving us 543187799000000
+ 77598257 × 80000000 yielding 6207860560000000

= 6828187699908102
