The weight ratio of Xiao Ming and Xiao Hong is 4:5, Xiao Ming weighs 20 kg, how much does Xiao Hong weigh?
小明和小红的重量比是4：5，小明重20千克，小红重多少千克．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">20 * (5/4)</gadget>
<output>25</output>

<result>25</result>