Cars A and B leave opposite places at the same time. Car A travels 90 kilometers per hour, and Car B travels 105 kilometers per hour. The two cars meet at a distance of 30 kilometers from the end point. How many kilometers are the distance between the two places?
甲、乙两车同时从两地相对开出，甲车每小时行90千米，乙车每小时行105千米，两车在距终点30千米处相遇，两地相距多少千米？
<gadget id="calculator">105 + 90</gadget>
<output>195</output>

<gadget id="calculator">105 - 90</gadget>
<output>15</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">30 * (2/15)</gadget>
<output>4</output>

<gadget id="calculator">195 * 4</gadget>
<output>780</output>

<result>780</result>