rides a bicycle and B walks. The two travel towards each other from the east and the west at the same time. When they meet, A travels 10.5 kilometers longer than B. (1/10) of the distance traveled by A is equal to (1/3) of the distance traveled by B. How many kilometers is the distance between the two places?
甲骑自行车，乙步行，两人分别从东西两地同时相向而行，相遇时，甲比乙多行驶10.5千米．甲所行路程的(1/10)与乙所行路程的(1/3)相等．东西两地相距多少千米？
<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<gadget id="calculator">10.5 / 7</gadget>
<output>1.5</output>

<gadget id="calculator">10 + 3</gadget>
<output>13</output>

<gadget id="calculator">1.5 * 13</gadget>
<output>19.5</output>

<result>19.5</result>