There are two small rods 20 decimeters and 28 decimeters long respectively. To cut them all into small sticks of the same length, no surplus is allowed, how many decimeters can each small stick be at the longest?
有两根小棒分别长20分米，28分米．要把它们都截成同样长的小棒，不许剩余，每根小棒最长能有多少分米？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>