The gas company lays a 2,800-meter gas pipeline, 30% of the total length is laid in the first week, and 35% of the total length is laid in the second week. How many meters are left to be laid?
煤气公司铺设一条2800米的煤气管道，第一周铺了全长的30%，第二周铺了全长的35%，还有多少米没有铺设？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (3/10) - (7/20)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">2_800 * (7/20)</gadget>
<output>980</output>

<result>980</result>