Alright, let's work through 90345100 times 67447258 step by step
90345100 × 67447258 = 67447258 × (90345100)
+ 67447258 × 0 producing 0
+ 67447258 × 00 that equals 0
+ 67447258 × 100 yielding 6744725800
+ 67447258 × 5000 what gives us 337236290000
+ 67447258 × 40000 what gives us 2697890320000
+ 67447258 × 300000 resulting in 20234177400000
+ 67447258 × 0000000 yielding 0
+ 67447258 × 90000000 yielding 6070253220000000

= 6093529268735800
