**The Adventure of Factorial Frog** Once upon a time, in a land filled with numbers, lived a little frog named Factorial. Factorial was not your ordinary frog. He had a special power - He could multiply numbers in a unique way! Factorial's power worked like this: if you gave him any number, he would multiply it by every number less than it until he reached one. For example, if you gave him the number 5, he would multiply 5 by 4, then that result by 3, then by 2, and finally by 1. The result would be 120. This special multiplication was known as "factorial", and Factorial the Frog was named after it. Factorial's friends were always amazed by his power. They would give him numbers and watch in awe as he quickly calculated the factorial. "5 factorial is 120", he would say, and everyone would cheer. One day, Factorial decided to go on an adventure to discover the largest factorial he could calculate. He hopped from lily pad to lily pad, each representing a diffe...