A mobile phone manufacturer's output this year has decreased by 20% compared to last year. This year, it produced 5.6 million mobile phones. How many million mobile phones were produced last year?
某手机厂家今年的产量比去年减少二成，今年生产手机560万台，去年生产手机多少万台？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">560 / (4/5)</gadget>
<output>700</output>

<result>700</result>