Alright, let's work through 87410778 times 99793451 step by step
87410778 × 99793451 = 99793451 × (87410778)
+ 99793451 × 8 that is equal 798347608
+ 99793451 × 70 that results in 6985541570
+ 99793451 × 700 that results in 69855415700
+ 99793451 × 0000 producing 0
+ 99793451 × 10000 which equals 997934510000
+ 99793451 × 400000 that results in 39917380400000
+ 99793451 × 7000000 that is equal 698554157000000
+ 99793451 × 80000000 which equals 7983476080000000

= 8723023191214878
