Lingling and Dongdong live in the east-west direction of the school respectively, and the distance between the two families is 800 meters. When school is over, the two leave school at the same time. After 4 minutes, they arrive home at the same time. Dongdong walks 80 meters per minute. How many meters does Lingling walk per minute?
玲玲和冬冬分别住在学校的东西方向，两家相距800米．放学时两人同时从学校出发，经过4分钟，两人同时到家，冬冬每分钟走80米，玲玲每分钟走多少米？
<gadget id="calculator">80 * 4</gadget>
<output>320</output>

<gadget id="calculator">800 - 320</gadget>
<output>480</output>

<gadget id="calculator">480 / 4</gadget>
<output>120</output>

<result>120</result>