Alright, let's work through 72122420 times 4244721 step by step
72122420 × 4244721 = 4244721 × (72122420)
+ 4244721 × 0 that is equal 0
+ 4244721 × 20 what gives us 84894420
+ 4244721 × 400 producing 1697888400
+ 4244721 × 2000 yielding 8489442000
+ 4244721 × 20000 that is equal 84894420000
+ 4244721 × 100000 that is equal 424472100000
+ 4244721 × 2000000 producing 8489442000000
+ 4244721 × 70000000 that equals 297130470000000

= 306139550744820
