The distance between A and B is 330 kilometers. Two trains are traveling towards each other at the same time. After 2.5 hours, they meet. The slow train travels 60 kilometers per hour. How many kilometers per hour does the express train travel? (column equation solution)
甲、乙两站间的路程为330千米，两列火车同时相向而行，经过2.5小时后相遇，慢车每小时行驶60千米，快车每小时行驶多少千米？(列方程解答)
<gadget id="calculator">60 * 2.5</gadget>
<output>150</output>

<gadget id="calculator">330 - 150</gadget>
<output>180</output>

<gadget id="calculator">180 / 2.5</gadget>
<output>72</output>

<result>72</result>