There are 201 original street lamps on a street, and the distance between two adjacent street lamps is 50 meters; now there are 50 new street lamps, what is the distance between two adjacent street lamps?
一条大街上原有路灯201盏，相邻两盏路灯相距50米；现在换新路灯增加了50盏，相邻两盏路灯的距离是多少米？
<gadget id="calculator">201 - 1</gadget>
<output>200</output>

<gadget id="calculator">50 - 1</gadget>
<output>49</output>

<gadget id="calculator">201 + 49</gadget>
<output>250</output>

<gadget id="calculator">50 / 250</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">200 * (1/5)</gadget>
<output>40</output>

<result>40</result>