bag of flour is 25 kilograms, 2 yuan per kilogram, how much is each bag of flour? (Write out the quantitative relationship first and then answer it)
一袋面粉25千克，每千克2元，每袋面粉多少钱？(先写出数量关系式再解答)
<gadget id="calculator">2 * 25</gadget>
<output>50</output>

<result>50</result>