The distance between the utility poles on both sides of the road is 30 meters. A passenger is sitting in a moving car. It takes exactly 3 minutes for him to see the first utility pole to the 26th utility pole. Find the speed of this car. How many kilometers per hour?
公路两边的电线杆间隔都是30米，一位乘客坐在行驶的汽车中，他从看到第1根电线杆到看到第26根电线杆正好是3分钟，求这辆汽车的速度是每小时行多少千米？
<gadget id="calculator">26 - 1</gadget>
<output>25</output>

<gadget id="calculator">30 / 1_000</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">3 / 60</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(3/100) / (1/20)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">25 * (3/5)</gadget>
<output>15</output>

<result>15</result>