Alright, let's work through 66721632 times 35688936 step by step
66721632 × 35688936 = 35688936 × (66721632)
+ 35688936 × 2 producing 71377872
+ 35688936 × 30 resulting in 1070668080
+ 35688936 × 600 resulting in 21413361600
+ 35688936 × 1000 which equals 35688936000
+ 35688936 × 20000 what gives us 713778720000
+ 35688936 × 700000 that equals 24982255200000
+ 35688936 × 6000000 giving us 214133616000000
+ 35688936 × 60000000 that equals 2141336160000000

= 2381224054263552
