The cafeteria bought back 5 bags of rice, each bag 50 kg. 3 yuan per kilogram, how much does it cost in total?
食堂买回5袋大米，每袋50千克．每千克3元，一共需要多少钱？
<gadget id="calculator">5 * 50 * 3</gadget>
<output>750</output>

<result>750</result>