A disk is divided into 4 pieces on average, and each piece is red, yellow, blue, and green. If the pointer rotates 100 times, how many times does it stop in the red area?
一个圆盘平均分为4块，每块颜色分别是红黄蓝绿，那么如果指针转动100次，停在红色区域的次数大约是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">100 * (1/4)</gadget>
<output>25</output>

<result>25</result>