Alright, let's work through 89878728 times 66924212 step by step
89878728 × 66924212 = 66924212 × (89878728)
+ 66924212 × 8 that equals 535393696
+ 66924212 × 20 yielding 1338484240
+ 66924212 × 700 giving us 46846948400
+ 66924212 × 8000 which equals 535393696000
+ 66924212 × 70000 yielding 4684694840000
+ 66924212 × 800000 giving us 53539369600000
+ 66924212 × 9000000 yielding 602317908000000
+ 66924212 × 80000000 that results in 5353936960000000

= 6015063046962336
