Alright, let's work through 67710397 times 58370771 step by step
67710397 × 58370771 = 58370771 × (67710397)
+ 58370771 × 7 yielding 408595397
+ 58370771 × 90 yielding 5253369390
+ 58370771 × 300 resulting in 17511231300
+ 58370771 × 0000 giving us 0
+ 58370771 × 10000 that results in 583707710000
+ 58370771 × 700000 that is equal 40859539700000
+ 58370771 × 7000000 that results in 408595397000000
+ 58370771 × 60000000 what gives us 3502246260000000

= 3952308077606087
