(1/2) of a bottle of apple juice is exactly 200 ml, Yangyang drank (1/4) of this bottle of apple juice, how many ml did he drink?
一瓶苹果汁的(1/2)正好是200毫升，洋洋喝了这瓶苹果汁的(1/4)，他喝了多少毫升？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">200 / (1/2)</gadget>
<output>400</output>

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

<gadget id="calculator">400 * (1/4)</gadget>
<output>100</output>

<result>100</result>