Alright, let's work through 20838730 times 61987768 step by step
20838730 × 61987768 = 61987768 × (20838730)
+ 61987768 × 0 yielding 0
+ 61987768 × 30 that equals 1859633040
+ 61987768 × 700 producing 43391437600
+ 61987768 × 8000 producing 495902144000
+ 61987768 × 30000 yielding 1859633040000
+ 61987768 × 800000 what gives us 49590214400000
+ 61987768 × 0000000 producing 0
+ 61987768 × 20000000 giving us 1239755360000000

= 1291746360654640
