Xiao Ming walks from home to school in the morning. If he walks 60 meters per minute, he will be late for class by 4 minutes; if he walks 80 meters per minute, he will be 3 minutes early. How many meters is the distance from Xiao Ming's home to school?
小明早上从家步行去学校上学，如果他每分钟走60米，上课要迟到4分钟；如果他每分钟走80米就可早到3分钟．小明的家到学校的路程是多少米．
<gadget id="calculator">60 * 4</gadget>
<output>240</output>

<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">240 + 240</gadget>
<output>480</output>

<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">480 / 20</gadget>
<output>24</output>

<gadget id="calculator">24 + 4</gadget>
<output>28</output>

<gadget id="calculator">60 * 28</gadget>
<output>1_680</output>

<result>1_680</result>