Task: Text Categorization
Input (English): The square root of this quantity is obtained when the gamma function is evaluated at one-half, and it can be approximated by Buffon's needle problem. The probability density function of the normal distribution has a coefficient of two times this quantity all to the negative one-half power, and e to the i raised to this power equals negative 1. The sine function equals zero at integer multiples of it. It is multiplied by four-thirds times the radius cubed to find the volume of a sphere, and it is also the ratio of a circle's circumference to its diameter. For 10 points, name this transcendental number commonly approximated as 3.14.
Output (English): Science