The store bought a batch of mineral water, and sold 8 boxes in the first week, which happened to be (2/7) of this batch of mineral water. How many boxes of this batch of mineral water are there in total?
商店进了一批矿泉水，第一周卖了8箱，正好是这批矿泉水的(2/7)，这批矿泉水一共有多少箱？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">8 / (2/7)</gadget>
<output>28</output>

<result>28</result>