Alright, let's work through 27996029 times 19680739 step by step
27996029 × 19680739 = 19680739 × (27996029)
+ 19680739 × 9 what gives us 177126651
+ 19680739 × 20 that is equal 393614780
+ 19680739 × 000 which equals 0
+ 19680739 × 6000 that equals 118084434000
+ 19680739 × 90000 that is equal 1771266510000
+ 19680739 × 900000 yielding 17712665100000
+ 19680739 × 7000000 that equals 137765173000000
+ 19680739 × 20000000 resulting in 393614780000000

= 550982539785431
