When Uncle Li went up the mountain, he walked 65 meters per minute and reached the top of the mountain in 40 minutes; when he went down the mountain, he returned by the same way and only took 26 minutes. How many meters per minute does Uncle Li walk down the mountain on average?
李叔叔上山时每分钟走65米，40分钟到达山顶；下山时按原路返回，只用了26分钟．李叔叔下山平均每分钟走多少米？
<gadget id="calculator">40 / 26</gadget>
<output>20/13 = around 1.538462</output>

<gadget id="calculator">65 * (20/13)</gadget>
<output>100</output>

<result>100</result>