3570
It's the product of the first three primes.
23.25
26.75
48.8
49.619
12.5
Well, honey, if you divide 608 by 6, you get 101 with a remainder of 2. So, the remainder of 608 divided by 6 is 2. Math doesn't have to be a headache, darling.
14.8333
27.125
161.2222
0.1169
Oh, dude, you want to know the unit's digits of the product of the first 21 prime numbers? Well, let me casually tell you that the unit's digit of a product depends on the unit's digits of the numbers being multiplied. Since the unit's digit of all prime numbers greater than 5 is either 1, 3, 7, or 9, the product of the first 21 prime numbers will end in a unit's digit that is a result of multiplying these digits together. Cool, right?