City A and City B are 960 kilometers apart. A bus leaves City A at a speed of 40 kilometers per hour. After driving for 16 hours, how many kilometers is there to City B?
甲乙城相距960千米，一辆客车以每小时40千米的速度从甲城开出，行驶了16小时以后，离乙城还有多少千米？
<gadget id="calculator">40 * 16</gadget>
<output>640</output>

<gadget id="calculator">960 - 640</gadget>
<output>320</output>

<result>320</result>