Covert the diameter of a log measured in centimetres to a girth measurement in inches
Conversion factor: Pi = 3.14159265359 one centimetre (cm) = 0.393700787401575 inches (in) 3.14159265359 * 0.393700787401575 = 1.2368475014133050430153425898331 diameter of one centimetre = 1.236 85 inches girth