There are 150 students in the sixth grade of Yugou Primary School, and the number of students in the third grade is 40 less than twice that of the sixth grade. How many students are there in the third and sixth grades?
渔沟小学六年级有150人，三年级的人数比六年级的2倍少40人．三、六年级共有多少人？
<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<gadget id="calculator">300 - 40</gadget>
<output>260</output>

<gadget id="calculator">260 + 150</gadget>
<output>410</output>

<result>410</result>