A model of an ancient covered bridge is 1.2 meters long, and the ratio of its length to the actual length is 1:25. The actual length of this ancient covered bridge is 30m, right? (Solve with ratio)
一座古廊桥模型长1.2米，它的长度与实际长度的比是1：25，这座古廊桥的实际长度是30m，对吗？(用比例解)
<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">1.2 / (1/25)</gadget>
<output>30</output>

<result>30</result>