Xiao Ming and Xiao Gang are walking towards each other from two places 150 kilometers apart at the same time. Xiao Ming travels 45 kilometers per hour on a motorcycle, and Xiao Gang travels 15 kilometers per hour on a bicycle. When will they meet?
小明和小刚同时从相距150千米的两地相对而行，小明骑摩托车每小时行45千米，小刚骑自行车每小时行15千米，他们几小时相遇？
<gadget id="calculator">45 + 15</gadget>
<output>60</output>

<gadget id="calculator">150 / 60</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>