Xiao Mei and Ou Ou travel towards each other from places A and B which are 105 kilometers apart at the same time, and meet each other in 5 hours. It is known that Ou Ou travels 3 kilometers more than Xiao Mei every hour. So, how many kilometers did Xiaomei travel when they met?
小美与欧欧同时从相距105千米的A、B两地相向而行，5小时相遇，己知欧欧每小时比小美多行3千米．那么，相遇时小美行了多少千米．
<gadget id="calculator">105 / 5</gadget>
<output>21</output>

<gadget id="calculator">21 - 3</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>