Alright, let's work through 87918676 times 45345039 step by step
87918676 × 45345039 = 45345039 × (87918676)
+ 45345039 × 6 that results in 272070234
+ 45345039 × 70 that results in 3174152730
+ 45345039 × 600 yielding 27207023400
+ 45345039 × 8000 that results in 362760312000
+ 45345039 × 10000 that results in 453450390000
+ 45345039 × 900000 giving us 40810535100000
+ 45345039 × 7000000 resulting in 317415273000000
+ 45345039 × 80000000 what gives us 3627603120000000

= 3986675792048364
