Li Zhuang wanted to dig a canal, 40% of the total length was repaired in the first week, and 30% of the total length was repaired in the second week. The first week was 160 meters more than the second week. How long is this canal in meters?
李庄要挖一条水渠，第一周修了全长的40%，第二周修了全长的30%．第一周比第二周多修160米，这条水渠全长多少米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) - (3/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">160 / (1/10)</gadget>
<output>1_600</output>

<result>1_600</result>