Xincun owns 612 TV sets this year, an increase of 2% over last year. How many TV sets did it have last year?
新村今年全村电视机拥有量为612台，比去年增加2%，去年有多少台？
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">1 + (1/50)</gadget>
<output>51/50 = around 1.02</output>

<gadget id="calculator">612 / (51/50)</gadget>
<output>600</output>

<result>600</result>