Alright, let's work through 28668980 times 90253647 step by step
28668980 × 90253647 = 90253647 × (28668980)
+ 90253647 × 0 yielding 0
+ 90253647 × 80 that results in 7220291760
+ 90253647 × 900 which equals 81228282300
+ 90253647 × 8000 what gives us 722029176000
+ 90253647 × 60000 that is equal 5415218820000
+ 90253647 × 600000 yielding 54152188200000
+ 90253647 × 8000000 that is equal 722029176000000
+ 90253647 × 20000000 that results in 1805072940000000

= 2587480000770060
