7.98 centimeters is equal to 3.141 inches.
To give some perspective, a standard AA battery is approximately 5 cm long, making 7.98 cm slightly longer than 1.5 AA batteries laid end to end. A 3 inch paperclip is just slightly shorter than 7.98 cm, with a difference of about 0.159 inches. Lastly, a common stick of gum is about 2 inches long, making it significantly shorter than 7.98 cm.