Both A and B start from two places at the same time by bicycle and walk toward each other. A travels 13 kilometers per hour and B travels 10 kilometers per hour. The two met at a distance of 3 kilometers from the midpoint of the two cities. How many kilometers are the distance between the two places?
甲乙二人都骑自行车从两地同时出发，相向而行．甲每小时行13千米，乙每小时行10千米．两人在距两城中点3千米处相遇，两地相距多少千米？
<gadget id="calculator">10 + 13</gadget>
<output>23</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">23 * 2</gadget>
<output>46</output>

<result>46</result>