Alright, let's work through 27248478 times 19890790 step by step
27248478 × 19890790 = 19890790 × (27248478)
+ 19890790 × 8 yielding 159126320
+ 19890790 × 70 which equals 1392355300
+ 19890790 × 400 that equals 7956316000
+ 19890790 × 8000 which equals 159126320000
+ 19890790 × 40000 which equals 795631600000
+ 19890790 × 200000 resulting in 3978158000000
+ 19890790 × 7000000 that equals 139235530000000
+ 19890790 × 20000000 producing 397815800000000

= 541993753717620
