20 athletes rode motorcycles around the circular track of the stadium end to end to perform. It is known that each car is 2 meters long and the distance between two adjacent cars is 18 meters. What is the length of the train in meters?
20个运动员，骑摩托车围绕体育场的圆形跑道头尾相接做表演．已知每辆车长2米，每相邻两车相隔18米，这列车队长多少米．
<gadget id="calculator">2 * 20</gadget>
<output>40</output>

<gadget id="calculator">18 * 20</gadget>
<output>360</output>

<gadget id="calculator">40 + 360</gadget>
<output>400</output>

<result>400</result>