Two people, A and B, are walking toward each other at the same speed from the east and west stations at the same time, and meet at a distance of 80 meters from the east station. Meet at meters, how many meters is the distance between the east and west stations?
甲、乙二人分别以均匀速度从东、西两车站同时相向而行，在距东站80米处相遇，相遇后两人继续前进到达对方的车站后都及时返回，又在离东站120米处相遇，求东西两车站相距多少米？
<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">240 + 120</gadget>
<output>360</output>

<gadget id="calculator">360 / 2</gadget>
<output>180</output>

<result>180</result>