According to legend, Li Bai, a poet in the Tang Dynasty, went to buy wine and walked on the street carrying a pot. When he met a shop, he doubled the price and drank 2 glasses when he saw flowers. On the way, I met the shop and flowers, and there were 2 glasses of wine left in the pot. How many glasses of wine are there in the jug?
相传唐代诗仙李白去买酒，提壶街上走，遇店加1倍，见花喝2杯．途中四遇店和花，最后壶中还剩2杯酒．壶中原有多少杯酒．
<gadget id="calculator">2 * 2 * 2 * 2</gadget>
<output>16</output>

<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">16 + 8 + 4 + 2 + 2</gadget>
<output>32</output>

<gadget id="calculator">32 / 16</gadget>
<output>2</output>

<result>2</result>