Wang Hong practiced running. Last week, she ran 2.5 kilometers on the least day of the 5 days, and ran 3 kilometers on the most day. So how many kilometers did Wang Hong run in total during the five days?
王红练习跑步，上周5天中最少的一天跑了2.5千米，最多的一天跑了3千米，那么这五天中，王红一共跑了多少千米之间
<gadget id="calculator">2.5 * 5</gadget>
<output>12.5</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">12.5 - 15</gadget>
<output>-2.5</output>

<result>-2.5</result>