Last year, the students of Guangming Primary School were from Hongqi Primary School (3/5). How many students are there?
去年光明小学的学生是红旗小学的(3/5)，今年光明小学转入60名学生，红旗小学转出20名学生，现在光明小学的学生是红旗小学的(3/4)，去年光明小学有学生多少人．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">20 * (3/4)</gadget>
<output>15</output>

<gadget id="calculator">60 + 15</gadget>
<output>75</output>

<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) * (3/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) - 1</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">75 / (1/4)</gadget>
<output>300</output>

<result>300</result>