The odometer reading of Beibei's car at the end of January was 1345 kilometers, and the odometer reading at the end of February was 2784 kilometers. How many kilometers did Beibei's car drive in February?
贝贝家的汽车1月底的里程表读数为1345千米，2月底的里程表读数是2784千米，贝贝家汽车2月份行驶了多少千米．
<gadget id="calculator">2_784 - 1_345</gadget>
<output>1_439</output>

<result>1_439</result>