The cafeteria originally had 26 bags of flour, but another 138 bags were shipped in. On average, 4 bags are used up every day. How many days can the flour be used for?
食堂原有26袋面粉，又运来138袋，平均每天要用掉4袋，这些面粉可以用多少天？
<gadget id="calculator">26 + 138</gadget>
<output>164</output>

<gadget id="calculator">164 / 4</gadget>
<output>41</output>

<result>41</result>