Alright, let's work through 66590490 times 5274739 step by step
66590490 × 5274739 = 5274739 × (66590490)
+ 5274739 × 0 giving us 0
+ 5274739 × 90 producing 474726510
+ 5274739 × 400 resulting in 2109895600
+ 5274739 × 0000 producing 0
+ 5274739 × 90000 that results in 474726510000
+ 5274739 × 500000 yielding 2637369500000
+ 5274739 × 6000000 that results in 31648434000000
+ 5274739 × 60000000 that is equal 316484340000000

= 351247454632110
