Now let's do some comparisons on how long it would take to go all the way around it:
Bugatti Veyron Super Sport: With a top speed of 429 km/h this car can drive around that square in under 50 minutes.
Usain Bolt: If Usain Bolt can maintain a 9.59 m/sec (in the 100 meter sprint) he could sprint around that square in just over 9 hours.
Michael Phelps: With an average speed of 6.414 km/h (in the 400 meter event), he can swim around the square in just over 53 hours.
Here's how many people each of the following counties can squeeze if using the example above:
Russia: 16,377,742,000,000 (16.37 trillion)
USA: 9,158,960,000,000 (9.15 trillion)
Canada: 9,093,507,000,000 (9.09 trillion)
Australia: 7,682,300,000,000 (7.68 trillion)
India: 2,973,193,000,000 (2.97 trillion)
Egypt: 995,450,000,000 (995 billion)
United Kingdom: 241,930,000,000 (242 billion)
Ireland: 68,883,000,000 (69 billion)
To fill up the entire earth's 148,940,000 km squared land area it would fit 148,940,000,000,000 people (148.94 trillion), or 21,000x more than today's 7 billion population.