A section of road with a length of 2000 meters, the distance between every two adjacent street lamps was originally 25 meters, but now it is changed to 40 meters, how many lights do not move.
一段长2000米的公路，原来每相邻两根路灯之间的距离为25米，现在要将其改为40米，有多少根不移动．
<gadget id="calculator">5 * 5 * 2 * 2 * 2</gadget>
<output>200</output>

<gadget id="calculator">2_000 / 200</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<result>11</result>