my country's civil aviation stipulates that every passenger who takes the economy class of a domestic flight can carry luggage not exceeding 20 kilograms (including 20 kilograms) free of charge; for the part exceeding 20 kilograms, a luggage ticket must be purchased at 1.5% of the original price of the plane ticket for each kilogram. Xiaohua's father flew back to Shanghai from Beijing and bought a "40% off" air ticket, which cost 678 yuan. The luggage he carries weighs 30 kilograms. How much is the luggage fee according to regulations?
我国民航规定，每位乘坐国内航班经济舱的旅客可以免费携带不超过20千克(包括20千克)的行李；超过20千克的部分，每千克要按飞机票原价的1.5%购买行李票．小华的爸爸从北京乘飞机返回上海，买的是"六折"机票，花了678元．他携带的行李重30千克，按规定应付行李费多少元？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">678 / (3/5)</gadget>
<output>1_130</output>

<gadget id="calculator">1.5 / 100</gadget>
<output>0.015</output>

<gadget id="calculator">1_130 * 0.015</gadget>
<output>16.95</output>

<gadget id="calculator">30 - 20</gadget>
<output>10</output>

<gadget id="calculator">16.95 * 10</gadget>
<output>169.5</output>

<result>169.5</result>