It takes less than 3 hours for a ship to sail downstream from port A to port B than to return from port B to port A. If the speed of the ship is 26 km/h and the water speed is 2 km/h, then the distance between port A and port B is How many kilometers?
轮船沿江从A港顺流行驶到B港，比从B港返回A港少用3小时，若船速为26千米/小时，水速为2千米/时，则A港和B港相距多少千米？
<gadget id="calculator">3 * 26 * 26</gadget>
<output>2_028</output>

<gadget id="calculator">3 * 26 * 2</gadget>
<output>156</output>

<gadget id="calculator">3 * 2 * 26</gadget>
<output>156</output>

<gadget id="calculator">3 * 2 * 2</gadget>
<output>12</output>

<gadget id="calculator">156 - 156 - 12</gadget>
<output>-12</output>

<gadget id="calculator">2_028 + (-12)</gadget>
<output>2_016</output>

<gadget id="calculator">2 - 26</gadget>
<output>-24</output>

<gadget id="calculator">26 + 2 + (-24)</gadget>
<output>4</output>

<gadget id="calculator">2_016 / 4</gadget>
<output>504</output>

<result>504</result>