A piece of rope, cut it into 10 meters or 8 meters. If there is nothing left, what is the shortest length of this rope?
一根绳子，把它全部截成10米一段，或者8米一段，都刚好截完没有剩余，这根绳子的长度最短有多少米．
<gadget id="calculator">2 * 2 * 2 * 5</gadget>
<output>40</output>

<result>40</result>