cube, four of which are painted red, one painted green, and one painted blue, is thrown 10 times by Xiao Ding at will, and after the 11th fall, what is the probability that the red face faces upwards?
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10次，第11次落下后，红色面朝上的可能性是多少．
<gadget id="calculator">4 + 1 + 1</gadget>
<output>6</output>

<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

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