Plant trees on both sides of a 300-meter-long road (both ends should be planted), and plant one tree every 4 meters. How many trees will be planted in total?
在一条长300米的公路两边栽树(两端要栽)，每隔4米栽一棵，这样一共要栽多少棵树？
<gadget id="calculator">300 / 4</gadget>
<output>75</output>

<gadget id="calculator">75 + 1</gadget>
<output>76</output>

<gadget id="calculator">76 * 2</gadget>
<output>152</output>

<result>152</result>