Xiaoming's family has 2000 kilograms of vegetables, and Xiaoqiang's family has 4 tons of vegetables. How many tons of vegetables do they have in total?
小明家有2000千克蔬菜，小强家有4吨蔬菜，他们两家一共有多少吨蔬菜？
<gadget id="calculator">2_000 / 1_000</gadget>
<output>2</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<result>6</result>