The engineering team dug a canal, digging 1.4 kilometers every day, and dug the full length (7/10) in 10 days. How many kilometers are left to be dug?
工程队挖一条水渠，每天挖1.4千米，10天挖了全长的(7/10)，还剩多少千米没有挖？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">10 / (7/10)</gadget>
<output>100/7 = around 14.285714</output>

<gadget id="calculator">1.4 * (100/7)</gadget>
<output>20</output>

<gadget id="calculator">1.4 * 10</gadget>
<output>14</output>

<gadget id="calculator">20 - 14</gadget>
<output>6</output>

<result>6</result>