In the sixth grade, 120 people participated in interest group activities last year, which is 1/5 less than this year. How many people participated this year?
六年级去年有120人参加兴趣小组活动，比今年减少(1/5)，今年有多少人参加？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">120 / (4/5)</gadget>
<output>150</output>

<result>150</result>