A cube, four of which are painted red, one painted green, and one painted blue, is thrown 100 times by Xiao Ding at random. What is the probability that the red side will face up after falling?
一个正方体，其中4个面涂红色，一个面涂绿色，一个面涂蓝色，小丁任意抛100次，落下后红面朝上的可能性为多少．
<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>