It is planned to sell 400 TV sets, but the actual sales are 1/5 more than the plan. How many TV sets are actually sold?
计划销售400台电视机，实际比计划多销售(1/5)，实际销售多少台电视机？
<gadget id="calculator">1 / 5</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">400 * (6/5)</gadget>
<output>480</output>

<result>480</result>