Fred and circles

The formulas used are:

$A = \pi r^2$ a.k.a. the area

and

$C = 2\pi r$ a.k.a. the circumference

(P.S: the order of multiplication in upper formulas is irrelevant)

So if the area is 15239.5238858 (marked as A), also pi is only 3.14.

This is how we get the radius out of the area:

$\sqrt{\frac{A}{3.14}}$

$= \sqrt{\frac{15239.5238858}{3.14}}$

$= \sqrt{4853.35155599}$ $= 69.6659999999$

if we round that to 3 digits, because the 4th digit is 9, we get 69.666.

Now we need to calculate the circumference of a circle whit radius of 69.666

Which, if we remove the decimal places is the answer!

So, this is the formula:

$C = 2\pi r$

which in our case is:

$C = 2 \times 3.14 \times 69.666$

which computed is:

437.50248

If we remove the decimals (because we can't have decimal crops), we get: 437 , which is the final answer