The distance between Naughty and Gang’s home is 900 meters. They started from home at the same time and walked towards each other. Naughty walked 70 meters per minute, just now walked 80 meters per minute. How many minutes later did they meet? (solution by equation)
淘气和刚刚家相距900米，两人同时从家出发相向而行，淘气每分走70米，刚刚每分走80米，几分钟之后两人相遇？(用方程解)
<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">900 / 150</gadget>
<output>6</output>

<result>6</result>