The price of a TV set is 2,400 yuan this year, this year is last year's (3/4), and the year before last was last year's (5/4), how much is the price of each TV set the year before last?
一种电视机每台售价今年是2400元，今年是去年的(3/4)，前年是去年的(5/4)，前年每台售价多少元？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2_400 / (3/4)</gadget>
<output>3_200</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">3_200 * (5/4)</gadget>
<output>4_000</output>

<result>4_000</result>