Xiao Ming and Xiao Qiang set off from Station A and C at the same time and walked towards each other. Xiao Ming met Xiao Qiang after 100 meters after passing Station B, and then the two continued to move forward. Xiao Ming went to Station C and returned immediately. cockroach. What is the distance between A and C?
小明和小强分别从甲丙两站同时出发相对而行，小明经过乙站100米后与小强相遇，然后两人又继续前进，小明走到丙站立即返回，经过乙站后300米又追上小强．甲、丙两站相距多少米？
<gadget id="calculator">100 + 300</gadget>
<output>400</output>

<gadget id="calculator">400 / 2</gadget>
<output>200</output>

<gadget id="calculator">200 + 100</gadget>
<output>300</output>

<gadget id="calculator">300 * 2</gadget>
<output>600</output>

<result>600</result>