There are 20 bags of rice and 50 bags of flour in the grain store, with a total weight of 2500 kg. It is known that the weight of 2 bags of rice is equal to the weight of 5 bags of flour. How much does a bag of rice weigh in kilograms?
粮店有大米20袋，面粉50袋，共重2500千克，已知2袋大米的重量和5袋面粉的重量相等，那么一袋大米重多少千克？
<gadget id="calculator">2.5 * 25</gadget>
<output>62.5</output>

<result>62.5</result>