On the side of the railway, there is a telegraph pole every 50 meters. When a passenger is on a moving train, it takes exactly 3 minutes from the first telegraph pole to the 101st telegraph pole. What is the speed of the train in kilometers per hour?
在铁路一旁，每隔50米有一根电线杆，某旅客在行进的火车里，从经过第1根电线杆到第101根电线杆，恰好过了3分钟．火车行进的速度是每小时多少千米？
<gadget id="calculator">101 - 1</gadget>
<output>100</output>

<gadget id="calculator">50 / 3</gadget>
<output>50/3 = around 16.666667</output>

<gadget id="calculator">60 / 1_000</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">100 * (50/3) * (3/50)</gadget>
<output>100</output>

<result>100</result>