Xiaoming and Xiaoqing are 1,800 meters apart. They set off from their home at the same time, walked toward each other, and met after 12 minutes. Xiao Ming walks 70 meters per minute, how many meters does Xiao Qing walk per minute?
小明和小青两家相距1800米，两人同时从自己家出发，相向而行，经过12分钟相遇．小明每分钟走70米，小青每分钟走多少米？
<gadget id="calculator">1_800 / 12</gadget>
<output>150</output>

<gadget id="calculator">150 - 70</gadget>
<output>80</output>

<result>80</result>