Cars A and B are traveling toward each other from two places at the same time. Car A travels 58 kilometers per hour, and Car B travels 79 kilometers per hour. The two cars meet at a distance of 42 kilometers from the midpoint. Find the distance in kilometers between the two places ?
甲、乙两车同时从两地相向而行，甲车每小时行58千米，乙车每小时行79千米，两车在距中点处42千米相遇，求两地相距多少千米？
<gadget id="calculator">58 + 79</gadget>
<output>137</output>

<gadget id="calculator">79 - 58</gadget>
<output>21</output>

<gadget id="calculator">2 / 21</gadget>
<output>2/21 = around 0.095238</output>

<gadget id="calculator">42 * (2/21)</gadget>
<output>4</output>

<gadget id="calculator">137 * 4</gadget>
<output>548</output>

<result>548</result>