The speed of the maglev train can reach 500 km/h, which is faster (7/3) than the ordinary train. What is the speed of the ordinary train?
磁悬浮列车的速度可达500千米/时，比普通列车快(7/3)，普通列车的速度是多少？
<gadget id="calculator">7 / 3</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">1 + (7/3)</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">500 / (10/3)</gadget>
<output>150</output>

<result>150</result>