There is a bag of rice weighing 150 kg in the cafeteria. I ate 60 kg in the first week and the same amount in the second week as in the first week. How many kg of rice are left in this bag? (answer in two ways)
食堂有一袋大米重150千克，第一周吃了60千克，第二周吃的和第一周吃的同样多，这袋大米还剩多少千克没吃？(用两种方法解答)
<gadget id="calculator">150 - 60 - 60</gadget>
<output>30</output>

<result>30</result>