Two bridges, the first bridge is 5600m long, 800m shorter than the second bridge, how many kilometers are the two bridges in total?
两座大桥，第一座大桥长5600m，比第二座大桥少800m，两座大桥一共多少km？
<gadget id="calculator">5_600 + 800 + 5_600</gadget>
<output>12_000</output>

<gadget id="calculator">12_000 / 1_000</gadget>
<output>12</output>

<result>12</result>