The express train and the local train depart from two places 270 kilometers apart at the same time, go towards each other, and meet on the way after 2 o'clock. The speed ratio of the express train to the slow train is 5:4, how many kilometers does the express train travel per hour?
快车和慢车同时从相距270千米的两地出发，相向而行，经过2时在途中相遇．快车和慢车的速度比是5：4，快车每小时行多少千米？
<gadget id="calculator">270 / 2</gadget>
<output>135</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">135 * (5/9)</gadget>
<output>75</output>

<result>75</result>