Alright, let's work through 6638634 times 74310578 step by step
6638634 × 74310578 = 74310578 × (6638634)
+ 74310578 × 4 what gives us 297242312
+ 74310578 × 30 giving us 2229317340
+ 74310578 × 600 which equals 44586346800
+ 74310578 × 8000 that is equal 594484624000
+ 74310578 × 30000 which equals 2229317340000
+ 74310578 × 600000 that equals 44586346800000
+ 74310578 × 6000000 giving us 445863468000000

= 493320729670452
