Two people, A and B, are walking towards each other from two places 150 kilometers apart. A travels 45 kilometers per hour on a motorcycle, and B travels 15 kilometers per hour on a bicycle. How many hours will it take for the two to meet? How many kilometers did A travel when they met?
甲、乙两人分别从相距150千米的两地相对而行，甲骑摩托车每小时行45千米，乙骑自行车每小时行15千米．经过几小时两人才能相遇？相遇时甲行了多少千米？
<gadget id="calculator">45 + 15</gadget>
<output>60</output>

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

<gadget id="calculator">(5/2) * 45</gadget>
<output>225/2 = around 112.5</output>

<result>225/2 = around 112.5</result>