Madrid is center of the iberian peninsula.
cattle
fashion
financial
shipping

Madrid, also known as the capital of Spain, is the financial center of the Iberian Peninsula. It is also the largest city in Spain by population.

2pi more meters because you find the circumference which is 6pi and 4pi and subtract it and you get 2pi

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.