There are 280 computers in a shopping mall, and they have been sold (2/7). How many computers have been sold?
某商场有电脑280台，已经售出了(2/7)，售出了多少台？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">280 * (2/7)</gadget>
<output>80</output>

<result>80</result>