Alright, let's work through 28299844 times 77836728 step by step
28299844 × 77836728 = 77836728 × (28299844)
+ 77836728 × 4 yielding 311346912
+ 77836728 × 40 giving us 3113469120
+ 77836728 × 800 that results in 62269382400
+ 77836728 × 9000 yielding 700530552000
+ 77836728 × 90000 what gives us 7005305520000
+ 77836728 × 200000 giving us 15567345600000
+ 77836728 × 8000000 yielding 622693824000000
+ 77836728 × 20000000 giving us 1556734560000000

= 2202767259870432
