Alright, let's work through 49120487 times 91027942 step by step
49120487 × 91027942 = 91027942 × (49120487)
+ 91027942 × 7 what gives us 637195594
+ 91027942 × 80 that is equal 7282235360
+ 91027942 × 400 that results in 36411176800
+ 91027942 × 0000 that results in 0
+ 91027942 × 20000 producing 1820558840000
+ 91027942 × 100000 resulting in 9102794200000
+ 91027942 × 9000000 that equals 819251478000000
+ 91027942 × 40000000 resulting in 3641117680000000

= 4471336841647754
