There are 6,500 chickens in a farm, which is 300 less than twice the number of ducks. How many ducks are there in the farm?
某养殖场有鸡6500只，比鸭的2倍少300只，养殖场里有鸭多少只？
<gadget id="calculator">6_500 + 300</gadget>
<output>6_800</output>

<gadget id="calculator">6_800 / 2</gadget>
<output>3_400</output>

<result>3_400</result>