A shopping mall sold 480 TVs last year, an increase of 20% compared to the previous year. How many TVs were sold in the previous year?
一个商场去年销售电视机480台，比前年的销售量增加20%，前年销售电视机多少台？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">480 / (6/5)</gadget>
<output>400</output>

<result>400</result>