Uncle Wang raises 2,000 chickens, ducks, and geese, among which chickens account for 3/5 of the total. The ratio of ducks to geese is 3:1. How many geese are you raising?
王大爷养鸡、鸭、鹅共2000只，其中鸡占总数的(3/5)，鸭和鹅只数比是3：1，养鹅多少只？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) * (1/4)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">2_000 * (1/10)</gadget>
<output>200</output>

<result>200</result>