The numbers 1, 2, 3, 4, 5, and 6 are written on each side of the small cube. If you throw it 30 times, how many times does "4" face up?
小正方体的各面分别写着数字1，2，3，4，5，6，如果掷30次，"4"朝上的次数大约是多少次．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">30 * (1/6)</gadget>
<output>5</output>

<result>5</result>