Uncle Zhang’s taxi’s odometer read 568 kilometers last weekend, and this weekend it read 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568千米，本周末读数为968千米，本周行驶路程为多少千米．
<gadget id="calculator">968 - 568</gadget>
<output>400</output>

<result>400</result>