Xiao Cong and Xiao Ming walked towards each other from Guangdong Beijiang Middle School and Guangdong Beijiang Experimental School respectively. Xiao Cong walked 70 meters per minute, and Xiao Ming walked 80 meters per minute. After a few minutes, the two met at a distance of 50 meters from the midpoint of the journey. How many kilometers are these two places apart?
小聪和小明同时分别从广东北江中学、广东北江实验学校相向而走，小聪每分钟走70米，小明每分钟走80米，经过几分钟后两人在距全程中点50米处相遇．问这两地相距多少千米？
<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">80 - 70</gadget>
<output>10</output>

<gadget id="calculator">2 / 10 / 1_000</gadget>
<output>1/5_000 = around 0.0002</output>

<gadget id="calculator">150 * 50 * (1/5_000)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>