The total length of Chengdu-Kunming Railway is 1100 kilometers, and bridges and tunnels account for about 2/5 of the total length. How long are bridges and tunnels?
成昆铁路全长1100千米，桥梁和隧道的长约占全长的(2/5)．桥梁和隧道约有多长．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_100 * (2/5)</gadget>
<output>440</output>

<result>440</result>