A pigeon can fly 120 kilometers per hour with the wind, which is equivalent to three times its speed against the wind. How many kilometers per hour can the pigeon fly against the wind? (column equation solution)
一只鸽子顺风每小时能飞行120千米，相当于它逆风飞行速度的3倍，鸽子逆风每小时能飞行多少千米．(列方程解答)
<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<result>40</result>