There are three classes in the sixth grade. Classes 1 and 2 account for 2/3 of the total number of students in the whole grade, and classes 2 and 3 account for 3/5 of the total number of students in the grade. It is known that there are 44 people in the second class of the sixth grade. Ask: How many people are there in the sixth grade?
六年级有三个班，一、二两班的人数占全年级人数的(2/3)，二、三两班的人数占全年级人数的(3/5)．已知六年级二班有44人，问：六年级有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) - 1</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">(2/3) + (-2/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">44 / (4/15)</gadget>
<output>165</output>

<result>165</result>