From a set of Chinese chess (32 pieces), draw a chess piece at random, what is the probability of drawing a black chess piece?
从一副中国象棋(32枚)中，任意摸出一枚棋子，摸到黑棋的可能性是多少．
<gadget id="calculator">16 / 32</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>