The passenger car and the truck start from two places a and b at the same time and run towards each other. They meet after one hour and 30 minutes. After meeting, the two cars continue to move forward in the original direction. The bus arrives at point b after one hour. How long does it take to reach point a?
客车和货车分别从a、b两地同时出发相向而行，一小时30分后相遇，相遇后两车沿原方向继续前进，客车一小时后到达b地，客车到达b地以后，货车要行多长时间才能到达a地？
<gadget id="calculator">1.5 * 1.5</gadget>
<output>2.25</output>

<gadget id="calculator">2.25 - 1</gadget>
<output>1.25</output>

<result>1.25</result>