4 students went on an outing, and they brought half a watermelon, how much watermelon did each student eat on average?
4个同学去郊游，他们带了半个西瓜，平均每个同学吃了多少西瓜？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) * (1/4)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>