Alright, let's work through 66016784 times 19977803 step by step
66016784 × 19977803 = 19977803 × (66016784)
+ 19977803 × 4 producing 79911212
+ 19977803 × 80 yielding 1598224240
+ 19977803 × 700 what gives us 13984462100
+ 19977803 × 6000 that is equal 119866818000
+ 19977803 × 10000 that results in 199778030000
+ 19977803 × 000000 that results in 0
+ 19977803 × 6000000 which equals 119866818000000
+ 19977803 × 60000000 producing 1198668180000000

= 1318870305445552
