Xiaoming weighs 45kg, which is 1/4 heavier than Xiaohong. How much does Xiaohong weigh in kg?
小明体重45kg，比小红重(1/4)，小红体重多少kg．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">45 / (5/4)</gadget>
<output>36</output>

<result>36</result>