The school found that many students were seriously wasting food during lunch, so they put up a slogan at the entrance of the dining hall, warning everyone not to waste food. The content is as follows: If each person wastes 1 grain of rice every day, how many tons of rice will be wasted every day with a population of 1.3 billion in the country, please cherish food. (It is known that 1 gram of rice is about 52 grains)
学校发现不少同学吃午餐时浪费粮食十分严重，于是在饭堂门口贴出一张标语，告诫大家千万不要浪费粮食．内容如下：如果每人每天浪费l粒大米，全国13亿人口，每天就浪费多少吨大米，请珍惜粮食．(已知l克大米约52粒)
<result>25</result>