A cube of wood, 6 sides are painted with color, so that after throwing the cube, the possibility of the red side facing up is (2/3), how many sides are painted red.
一个正方体木块，6个面都涂上颜色，使得正方体掷出后，红色面朝上的可能性为(2/3)，有多少个面涂上红色．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 * (2/3)</gadget>
<output>4</output>

<result>4</result>