The power company buried the same number of utility poles on both sides of the road, a total of 402, and the distance between every two adjacent poles was 20 meters. Later, they were all refitted and only 202 were buried. How many meters is the distance between each adjacent pair after refitting?
电力公司在公路两旁埋同样多的电线杆共402根，每相邻两根之间的距离是20米．后来全部改装，只埋了202根．改装后每相邻两根之间的距离是多少米．
<gadget id="calculator">402 / 2</gadget>
<output>201</output>

<gadget id="calculator">201 - 1</gadget>
<output>200</output>

<gadget id="calculator">200 * 20</gadget>
<output>4_000</output>

<gadget id="calculator">202 / 2</gadget>
<output>101</output>

<gadget id="calculator">101 - 1</gadget>
<output>100</output>

<gadget id="calculator">4_000 / 100</gadget>
<output>40</output>

<result>40</result>