A bucket of water with the bucket weighs 18.6 kg, and half of the water with the bucket weighs 9.9 kg. How much does this bucket weigh?
一桶水连桶重18.6千克，倒掉一半水连桶还重9.9千克．这个水桶重多少千克？
<gadget id="calculator">18.6 - 9.9</gadget>
<output>8.7</output>

<gadget id="calculator">8.7 * 2</gadget>
<output>17.4</output>

<gadget id="calculator">18.6 - 17.4</gadget>
<output>1.2</output>

<result>1.2</result>