Description: Given three points on three-dimensional space, in order to calculate the three-point vertex of the triangle area. The first line of input contains an integer T (T> 0), T represents a total set of test data. Each set of data representing three rows, each row describes each coordinate of a point. Coordinates of the point will be given in the form xyz, represents coordinates of this point is (x, y, z), where x, y, z are floating point numbers in the range [-100, 100]. For each test, the output area of the triangle (and standard error of the answer can not exceed 10-6).
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