Xiaogang and Xiaoying walk toward each other from places A and B respectively, and meet each other in 8 minutes. If Xiaogang walks 10 meters less per minute and Xiaoying walks 30 meters more per minute, then they will meet each other in 7 minutes. Find the distance between AB and AB in meters.
小刚和小英分别从A、B两地相向而行，8分钟相遇．如果小刚每分钟少走10米，小英每分钟多走30米，则7分钟相遇．求AB两地相距多少米．
<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/7) - (1/8)</gadget>
<output>1/56 = around 0.017857</output>

<gadget id="calculator">20 / (1/56)</gadget>
<output>1_120</output>

<result>1_120</result>