Alright, let's work through 66389294 times 5510078 step by step
66389294 × 5510078 = 5510078 × (66389294)
+ 5510078 × 4 what gives us 22040312
+ 5510078 × 90 which equals 495907020
+ 5510078 × 200 that equals 1102015600
+ 5510078 × 9000 which equals 49590702000
+ 5510078 × 80000 that equals 440806240000
+ 5510078 × 300000 giving us 1653023400000
+ 5510078 × 6000000 that results in 33060468000000
+ 5510078 × 60000000 that equals 330604680000000

= 365810188304932
