Alright, let's work through 7740071 times 42400859 step by step
7740071 × 42400859 = 42400859 × (7740071)
+ 42400859 × 1 that is equal 42400859
+ 42400859 × 70 what gives us 2968060130
+ 42400859 × 000 that equals 0
+ 42400859 × 0000 that equals 0
+ 42400859 × 40000 resulting in 1696034360000
+ 42400859 × 700000 producing 29680601300000
+ 42400859 × 7000000 giving us 296806013000000

= 328185659120989
