Fill a bucket with water and pour water into an empty tank. If 2 buckets are poured, the weight of the tank is 60 kg. If 5 buckets are poured, the weight of the tank is 102 kg. How much does this cylinder weigh?
用一个水桶盛满水向一个空缸里倒水，如果倒入2桶，连缸重60千克，如果倒进5桶，连缸重102千克．这个缸重多少？
<gadget id="calculator">102 - 60</gadget>
<output>42</output>

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

<gadget id="calculator">42 / 3</gadget>
<output>14</output>

<gadget id="calculator">14 * 2</gadget>
<output>28</output>

<gadget id="calculator">60 - 28</gadget>
<output>32</output>

<result>32</result>