Two people, A and B, start from two places by bicycle and walk toward each other. A travels 13 kilometers per hour, and B travels 12 kilometers per hour. After 4 hours, the distance between the two is still 18 kilometers. How many kilometers is the distance between the two places?
甲乙二人骑自行车从两地出发，相向而行．甲每小时行13千米，乙每小时行12千米，4小时后两人还相距18千米，两地的距离是多少千米？
<gadget id="calculator">13 + 12</gadget>
<output>25</output>

<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">100 + 18</gadget>
<output>118</output>

<result>118</result>