Alright, let's work through 21744073 times 98376597 step by step
21744073 × 98376597 = 98376597 × (21744073)
+ 98376597 × 3 yielding 295129791
+ 98376597 × 70 that results in 6886361790
+ 98376597 × 000 what gives us 0
+ 98376597 × 4000 that equals 393506388000
+ 98376597 × 40000 that is equal 3935063880000
+ 98376597 × 700000 that equals 68863617900000
+ 98376597 × 1000000 that results in 98376597000000
+ 98376597 × 20000000 that is equal 1967531940000000

= 2139107906659581
