The weight ratio of Xiao Ming and Xiao Fang is 4:5, and Xiao Ming's weight is 20kg, so what is Xiao Fang's weight in kg?
小明和小芳的体重比是4：5，小明体重是20kg，那么小芳的体重是多少kg．
<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>