Practice for rates per 100,000 population.
Practice for prime factorization.
Practice for scientific notation.
100! cannot be found on your calculator because it is more than 10 raised to the power of 100. It can be split into 60! * 100nPr40, both numbers less than 10 to the 100th power. Find these values and multiply them together by hand to find 100!
This answer is in the comments of this post.
Practice for binary to decimal.