Mingming’s home is 300 meters south of Suguo Supermarket, which is recorded as +300 meters. Now he walks north from his home for 5 minutes, and walks 120 meters per minute. What number can be used to express his location after 5 minutes?
明明家在苏果超市的南边300米处，记作+300米，现在他从家往北走5分钟，每分钟走120米，5分钟后他所在的位置可以用什么数表示？
<gadget id="calculator">120 * 5</gadget>
<output>600</output>

<gadget id="calculator">600 - 300</gadget>
<output>300</output>

<result>300</result>