The speed of an EMU is 220 km/h, which is 40 kilometers more than 1.5 times the speed of ordinary trains. What is the speed of ordinary trains?
一列动车的速度是220千米/时，比普通列车速度的1.5倍还多40千米．普通列车的速度是多少？
<gadget id="calculator">220 - 40</gadget>
<output>180</output>

<gadget id="calculator">180 / 1.5</gadget>
<output>120</output>

<result>120</result>