A batch of rice was shipped from the cafeteria, 150 kilograms were eaten, and the rest was three times as much. How many kilograms of rice did the cafeteria bring?
食堂运来一批大米，吃掉150千克，剩下的是吃掉的3倍，食堂运来多少千克大米？
<gadget id="calculator">150 * 3</gadget>
<output>450</output>

<gadget id="calculator">450 + 150</gadget>
<output>600</output>

<result>600</result>