Divide the length of 2540 meters less than 6 kilometers and 40 meters into 7 parts, how much is each part?
把比6千米40米少2540米的长度平均分成7份，每份是多少．
<gadget id="calculator">6_040 - 2_540</gadget>
<output>3_500</output>

<gadget id="calculator">3_500 / 7</gadget>
<output>500</output>

<result>500</result>