Wu Song went to the hotel to buy wine, and the waiter poured 3 bowls of wine into their wine jug, and the weight of the jug was 33 taels; after pouring 5 bowls of wine, the weight of the jug was 45 taels.
武松去酒店买酒，店小二往他们的酒壶里倒了3碗酒后，连壶共重33两；倒进5碗酒后，连壶共重45两，酒壶重多少两．
<gadget id="calculator">45 - 33</gadget>
<output>12</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">33 - 18</gadget>
<output>15</output>

<result>15</result>