There are 200 students in the second grade of Sun City Primary School, and the number of students in the third grade is 100 less than twice that of the second grade. How many students are there in the third grade?
太阳城小学二年级有学生200人，三年级学生的人数比二年级的2倍少100人．三年级有学生多少人？
<gadget id="calculator">200 * 2</gadget>
<output>400</output>

<gadget id="calculator">400 - 100</gadget>
<output>300</output>

<result>300</result>