The running speed of the maglev train can reach 400 km/h, and the ordinary train is slower than it (5/8), what is the speed of the ordinary train in km/h?
磁悬浮列车运行速度可达400千米/小时，普通列车比它慢(5/8)，普通列车的速度是多少千米/小时？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">400 * (3/8)</gadget>
<output>150</output>

<result>150</result>