The engineering team dug an 800-meter canal, dug the full length (3/8) on the first day, and dug 40% of the full length on the second day. How many meters are left to be dug?
工程队挖一条800米的水渠，第一天挖了全长的(3/8)，第二天挖了全长的40%，还剩下多少米没有挖？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/8) + (2/5)</gadget>
<output>31/40 = around 0.775</output>

<gadget id="calculator">1 - (31/40)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">800 * (9/40)</gadget>
<output>180</output>

<result>180</result>