75 willow trees were planted on one side of a river embankment. A hibiscus tree is planted between every two willow trees, how many hibiscus trees are planted?
在一条河堤的一边栽了75棵柳树．每两棵柳树中间栽一棵芙蓉树，栽芙蓉树多少棵？
<gadget id="calculator">75 - 1</gadget>
<output>74</output>

<result>74</result>