Xian'an Central Primary School shipped 25 boxes of story books and 24 boxes of popular science books, each weighing 50 kilograms. How many kilograms of story books and popular science books were shipped in total?
仙庵中心小学运来25箱故事书和24箱科普书，每箱都是50千克，运来的故事书和科普书共多少千克？
<gadget id="calculator">25 + 24</gadget>
<output>49</output>

<gadget id="calculator">50 * 49</gadget>
<output>2_450</output>

<result>2_450</result>