Grandma Li bought back a duck weighing 1.5 kilograms and a chicken weighing 2.5 kilograms, and put them in a basket with vegetables, weighing 10 kilograms in total. Given that the basket weighs 1 kg, how much does the vegetable weigh?
李奶奶买回一只重1.5千克的鸭和一只重2.5千克的鸡，放在装有蔬菜的篮子里，共重10千克．已知篮子重1千克，蔬菜重多少千克？
<gadget id="calculator">10 - 1.5 - 2.5 - 1</gadget>
<output>5</output>

<result>5</result>