Alright, let's work through 90378690 times 78294013 step by step
90378690 × 78294013 = 78294013 × (90378690)
+ 78294013 × 0 yielding 0
+ 78294013 × 90 that equals 7046461170
+ 78294013 × 600 that results in 46976407800
+ 78294013 × 8000 what gives us 626352104000
+ 78294013 × 70000 producing 5480580910000
+ 78294013 × 300000 what gives us 23488203900000
+ 78294013 × 0000000 that equals 0
+ 78294013 × 90000000 that is equal 7046461170000000

= 7076110329782970
