There were 24 bags of rice in the cafeteria, but 42 bags were shipped in; the cafeteria needs 3 bags of rice per week on average. How many weeks will this rice last?
食堂里原来有24袋大米，又运来了42袋；食堂平均每周需要3袋大米．这些大米能够吃多少周？
<gadget id="calculator">24 + 42</gadget>
<output>66</output>

<gadget id="calculator">66 / 3</gadget>
<output>22</output>

<result>22</result>