Alright, let's work through 78494453 times 72048201 step by step
78494453 × 72048201 = 72048201 × (78494453)
+ 72048201 × 3 which equals 216144603
+ 72048201 × 50 which equals 3602410050
+ 72048201 × 400 which equals 28819280400
+ 72048201 × 4000 that is equal 288192804000
+ 72048201 × 90000 what gives us 6484338090000
+ 72048201 × 400000 giving us 28819280400000
+ 72048201 × 8000000 which equals 576385608000000
+ 72048201 × 70000000 that is equal 5043374070000000

= 5655384127129053
