The 111th Spring Canton Fair opened in Guangzhou in 2012. As of May 26, the highest single-day passenger flow of the Canton Fair was about 124,000 person-times, 16,000 person-times less than twice the same period of the previous session. How many people attended the last Canton Fair in a single day? (Solution of column equation)
2012年第111届春季广交会在广州开幕．截至5月26日，广交会单日最高客流量约是12.4万人次，比上届同期的2倍少1.6万人次．上届广交会单日有多少万人参加？(列方程解)
<gadget id="calculator">12.4 + 1.6</gadget>
<output>14</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<result>7</result>