The longest cross-sea bridge in the world is the Hangzhou Bay Bridge in my country, with a total length of 36 kilometers, which is about 20 times that of the Rui'an Feiyunjiang Bridge and more than 1 kilometer. How many kilometers is the Ruian Feiyunjiang Bridge?
世界上最长的跨海大桥是我国的杭州湾跨海大桥，全长有36千米，大约是瑞安飞云江大桥的20倍多1千米，瑞安飞云江大桥大约有多少千米．
<gadget id="calculator">36 - 1</gadget>
<output>35</output>

<gadget id="calculator">35 / 20</gadget>
<output>7/4 = around 1.75</output>

<result>7/4 = around 1.75</result>