There are 870 washing machines in the shopping mall, and (2/3) are sold, how many were sold?
商场有870台洗衣机，卖出了(2/3)，卖出了多少台？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">870 * (2/3)</gadget>
<output>580</output>

<result>580</result>