One lap of the sports track is 400 meters, and Uncle Wang insists on running two and a half laps every day. How many meters does he run every day?
运动场跑道一圈是400米，王叔叔每天坚持跑2圈半．他每天跑多少米？
<gadget id="calculator">400 * 2</gadget>
<output>800</output>

<gadget id="calculator">400 / 2</gadget>
<output>200</output>

<gadget id="calculator">800 + 200</gadget>
<output>1_000</output>

<result>1_000</result>