Two engineering teams dug a 2,000-meter-long canal from both ends at the same time. The first team dug an average of 135 meters a day, and the second team dug an average of 125 meters a day. How many meters were left undug after 7 days?
两个工程队同时从两端挖一条长2000米的水渠，第一队平均每天挖135米，第二队平均每天挖125米，7天后还剩多少米没有挖？
<gadget id="calculator">135 + 125</gadget>
<output>260</output>

<gadget id="calculator">260 * 7</gadget>
<output>1_820</output>

<gadget id="calculator">2_000 - 1_820</gadget>
<output>180</output>

<result>180</result>