Xiaoying and Xiaojun set off from places A and B at the same time and walk towards each other. After 10 minutes, they meet each other. If each of them walks 3 meters more per minute, they will meet after 9 minutes. How far apart are the places?
小英和小军两人分别从A、B两地同时出发，相向而行，经过10分钟相遇，若每人每分钟都多行3米，则经过9分钟两人就相遇了，A、B两地相距多远？
<gadget id="calculator">9 * 3 * 2</gadget>
<output>54</output>

<gadget id="calculator">10 - 9</gadget>
<output>1</output>

<gadget id="calculator">54 / 1</gadget>
<output>54</output>

<gadget id="calculator">54 * 10</gadget>
<output>540</output>

<result>540</result>