There are two roads, the first one is 16 kilometers long and 3 kilometers shorter than the second one, how many kilometers are the total length of the two roads?
有两条公路，第一条长16千米，比第二条短3千米，两条公路共长多少千米？
<gadget id="calculator">16 + 3 + 16</gadget>
<output>35</output>

<result>35</result>