Century Avenue in Binhai City has a total length of 2400m, and an osmanthus tree is planted every 10m on both sides of the road (both ends must be planted). Put a ginkgo tree between every two sweet-scented osmanthus trees, how many ginkgo trees should be planted in total?
滨海市的世纪大道全长2400m，道路两旁每隔10m种一棵桂花树(两端都要种)．在每两颗桂花树之间载一棵银杏树，一共要栽多少棵银杏树？
<gadget id="calculator">2_400 / 10</gadget>
<output>240</output>

<gadget id="calculator">240 * 2</gadget>
<output>480</output>

<result>480</result>