The cafeteria used exactly 2 bottles of peanut oil in 7 days, a total of 6 kg. How many bottles of peanut oil are used on average per day?
食堂7天正好用去2瓶花生油，共6千克．平均每天用花生油多少瓶．
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>