Gooday Home Appliances Store sold 2,800 TVs this year, an increase of 40% compared to last year. How many TVs were sold last year? (solution by equation)
日日顺家电商场今年销售2800台电视机，今年销售比去年增加了40%，去年销售电视机多少台？(用方程解)
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">2_800 / (7/5)</gadget>
<output>2_000</output>

<result>2_000</result>