There are 120 students in the sixth grade, which is equivalent to (2/3) the number of students in the fifth grade. How many students are there in the fifth and sixth grades?
六年级有学生120人，相当于五年级学生人数的(2/3)，五年级和六年级一共有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">120 / (2/3)</gadget>
<output>180</output>

<gadget id="calculator">180 + 120</gadget>
<output>300</output>

<result>300</result>