Anything you like as long as one of them is greater than or equal to sqrt(409). Let L be any length greater than sqrt(409) feet and let B = 409/L feet Then L*B = L*(409/L) = 409 sq feet.
About 409 square feet.
The average speed of a human walking is 4 miles per hour. So, the human goes 21,120 feet in 60 minutes. So, the human goes 352 feet in 1 minute. Then, we divide 548 feet by 352 feet to get the time. 548 feet / 352 feet = 1.556818182 minutes. So, this walk will take 1 minute, 33 seconds, and 409 milliseconds.
896 ÷ 409 = 2 with remainder 78.
409 Cubic Inches = 6.7 liters
409
409 = 409/1
The factors of 409 are: 1, 409.
409
409 miles
6.8167 hours.
409