On October 1, 2009, the 60th anniversary of the founding of the People's Republic of China, a grand military parade and various celebrations were held. 150 students from the sixth grade of a primary school in Beijing were divided into two groups and went to Tiananmen Square. After transferring 50 people from the first group, the number of the first group is exactly (2/3) of the second group. So, how many people are in the second group?
2009年10月1日，中华人民共和国成立60周年，举行了盛大的阅兵仪式和各种庆祝活动．北京某小学六年级150人分成两个大组前往天安门广场．从第一组调出50人后，第一组人数恰好是第二组的(2/3)．那么，第二组有多少人？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">150 * (3/5)</gadget>
<output>90</output>

<result>90</result>