Alright, let's work through 19722445 times 6487388 step by step
19722445 × 6487388 = 6487388 × (19722445)
+ 6487388 × 5 resulting in 32436940
+ 6487388 × 40 that equals 259495520
+ 6487388 × 400 yielding 2594955200
+ 6487388 × 2000 yielding 12974776000
+ 6487388 × 20000 yielding 129747760000
+ 6487388 × 700000 yielding 4541171600000
+ 6487388 × 9000000 yielding 58386492000000
+ 6487388 × 10000000 yielding 64873880000000

= 127947153023660
