Cartesian Product

If $X = \{a, d, e, f, x, y, z, w, u, v\}$, $Y = \{-1, -2, 3, 4, 9, 8, 78, 900, 3546, 42\}$, $Z = \{0, 1, 2, 3, 100\}$ and $W = \{a^2, b^2, c^3, d^7, h^{387}\}$, what is $|X \times Y \times Z \times W|$?