The odometer reading of Uncle Zhang’s taxi last weekend was 569 kilometers, and the reading this weekend was 968 kilometers. How many kilometers did he drive this week?
张叔叔上周末出租车的里程表读数为569千米，本周末读数为968千米，本周行驶路程为多少千米．
<gadget id="calculator">968 - 569</gadget>
<output>399</output>

<result>399</result>