Xiaohong’s family has 130 geese, twice as many ducks as geese, and 50 fewer chickens than the total number of geese and ducks. How many chickens are there?
小红家养了鹅130只，鸭的只数是鹅的2倍，鸡的只数比鹅和鸭的总数少50只，鸡有多少只？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">130 * 3</gadget>
<output>390</output>

<gadget id="calculator">390 - 50</gadget>
<output>340</output>

<result>340</result>