A bottle of beverage is 300ml, the ratio of orange juice to water is 1:4, after Xiaojing drank half of it, what is the content of orange juice in the remaining beverage
一瓶饮料300毫升，其橙汁与水的比是1：4，小晶喝去一半后，剩下的饮料中，橙汁的含量是多少
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/5) * 1</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>