840.53 centimeters is equivalent to 330.91 inches.
Some comparisons to known objects of similar size include:
1. The height of the Eiffel Tower, which is approximately 324 meters or 1063 feet.
2. The length of a football field, which is 360 feet or 109.7 meters (including the end zones).
3. The average adult giraffe, which can reach a height of around 18 feet or 549 centimeters.
4. The wingspan of a Boeing 747, which can range from 60 to 70 meters or 197 to 230 feet.
5. The height of the Statue of Liberty, which is 305 feet or 93 meters.