The students are conducting military training, and they will walk 12 kilometers in 3 hours. At this speed, they will have to walk for 2 hours to reach the destination. How many kilometers is the distance of this march?
同学们进行军事训练，3小时走12千米，照这样的速度，还要走2小时才能到达目的地，这次行军的路程是多少千米？
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<result>20</result>