street lamp is installed every 40 meters on one side of the road, and a total of 26 street lamps are installed on this side (installed at both ends). How long is this road?
公路一侧每隔40米安装一盏路灯，这一侧共安装了26盏路灯(两端都要安装)，这条公路有多长？
<gadget id="calculator">26 - 1</gadget>
<output>25</output>

<gadget id="calculator">25 * 40</gadget>
<output>1_000</output>

<result>1_000</result>