Alright, let's work through 89190879 times 74049702 step by step
89190879 × 74049702 = 74049702 × (89190879)
+ 74049702 × 9 that equals 666447318
+ 74049702 × 70 which equals 5183479140
+ 74049702 × 800 producing 59239761600
+ 74049702 × 0000 yielding 0
+ 74049702 × 90000 that is equal 6664473180000
+ 74049702 × 100000 that results in 7404970200000
+ 74049702 × 9000000 that results in 666447318000000
+ 74049702 × 80000000 yielding 5923976160000000

= 6604558011068058
