Which of the following numbers can be proportional to the three numbers 4, 5, and 20
下面各数中，能与4、5、20这三个数组成比例的是多少
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * 20</gadget>
<output>16</output>

<result>16</result>