The naughty family drove to the ancient capital for tourism. His home is 1,000 kilometers away from the ancient capital. He drove 285 kilometers on the first day and 260 kilometers on the second day. How many kilometers will he have to drive to reach the ancient capital?
淘气一家开车去古都旅游．他家距古都1000千米，第一天行驶了285千米，第二天行驶了260千米，还要在行驶多少千米到达古都？
<gadget id="calculator">285 + 260</gadget>
<output>545</output>

<gadget id="calculator">1_000 - 545</gadget>
<output>455</output>

<result>455</result>