A truck needs to travel 500 kilometers to deliver relief supplies to the disaster area. You have been driving at a speed of 80 kilometers per hour for 2.5 hours, how many kilometers are there to the destination?
一辆卡车往灾区运送救灾物资，需要行驶500千米．已经以每小时80千米的速度行驶了2.5小时，离目的地还有多少千米路程？
<gadget id="calculator">80 * 2.5</gadget>
<output>200</output>

<gadget id="calculator">500 - 200</gadget>
<output>300</output>

<result>300</result>