There are 120 students in the fifth grade of Gongyi Primary School, and 30 students in the sixth grade are 1.5 times less than the fifth grade. How many people are in the sixth grade?
公义小学五年级有学生120人，六年级的人数比五年级的1.5倍少30人．六年级有多少人？
<gadget id="calculator">120 * 1.5</gadget>
<output>180</output>

<gadget id="calculator">180 - 30</gadget>
<output>150</output>

<result>150</result>