In Xiaokang Village, 30% of the total length of the embankment was repaired in the first week, and 1,500 meters in the second week. The total number of meters repaired in these two weeks accounted for (4/5) of the total length. How many meters are left on this flood barrier?
小康村修防洪堤，第一周修了全长的30%，第二周修了1500米，这两周修的总米数占全长的(4/5)．这条防洪堤还有多少米没修？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(4/5) - (3/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1_500 / (1/2)</gadget>
<output>3_000</output>

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

<gadget id="calculator">3_000 * (1/5)</gadget>
<output>600</output>

<result>600</result>