The fruit store shipped a batch of apples, sold them on the first day (3/10), sold the remaining 80% on the second day, and left 168 kilograms, how many kilograms were sold on the second day?
水果商店运进一批苹果，第一天售出(3/10)，第二天售出余下的80%，还剩168千克，第二天售出多少千克？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(7/10) * (1/5)</gadget>
<output>7/50 = around 0.14</output>

<gadget id="calculator">168 / (7/50)</gadget>
<output>1_200</output>

<gadget id="calculator">1_200 * (7/10) * (4/5)</gadget>
<output>672</output>

<result>672</result>