The whole journey from Hangzhou to Shanghai is 198 kilometers long. The express train and the local train depart from opposite places respectively, and the two trains meet after 1.5 hours. The slow train travels 45 kilometers per hour, how many kilometers per hour does the express train travel?
杭州到上海全程长198千米，快车和慢车分别从两地相对开出，1.5小时后两车相遇．慢车每小时行45千米，快车每小时行多少千米？
<gadget id="calculator">198 / 1.5</gadget>
<output>132</output>

<gadget id="calculator">132 - 45</gadget>
<output>87</output>

<result>87</result>