The largest and deepest lake in Jiuzhaigou is Changhai. The widest point is about 4400m, which is (9/20) shorter than its length. What is its length in meters?
九寨沟中最大最深的湖泊是长海，最宽处约4400m，比它的长短(9/20)．它的长约是多少米？
<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 - (9/20)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">4_400 / (11/20)</gadget>
<output>8_000</output>

<result>8_000</result>