Xiao Ming is playing a coin tossing game. He tosses the coin 9 times in the air, and the results are all heads up after it falls. Then what is the probability of the 10th time he tosses the coin and it lands up heads?
小明做抛硬币的游戏，他将硬币往空中扔了9次，落下后结果都是正面朝上，那么他扔第10次，落下后正面朝上的可能性是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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