Uncle Zhang runs to exercise. On a 500-meter long runway, he insisted on running 7 times a day, how many meters did he run every day?
张叔叔跑步锻炼身体．他在一条长500米的跑道上，每天坚持跑7个来回，他每天跑了多少米？
<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">500 * 14</gadget>
<output>7_000</output>

<result>7_000</result>