SETTING THE BOARD

I have a single chessboard and a single set of chessmen. In how many different ways may the men be correctly set up for the beginning of a game? I find that most people slip at a particular point in making the calculation.

组合数学 -> 乘法法则/乘积法则

来源：

Amusements in Mathematics, Henry Ernest Dudeney 问题 346

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