Which of the following numbers can the three numbers 18, 0.4 and 5 be proportional to? How many
18，0.4与5这三个数能和下列哪个数组成比例？多少
<gadget id="calculator">18 / 0.4</gadget>
<output>45</output>

<gadget id="calculator">5 / 45</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>