The students collected tree species. They collected 35 kilograms on the first day, and 16 kilograms more than the first day on the second day. How many kilograms of tree species did they collect on the second day?
同学们采集树种，第一天采集了35千克，第二天比第一天多采了16千克，第二天采集了多少千克的树种？
<gadget id="calculator">35 + 16</gadget>
<output>51</output>

<result>51</result>