The distance between A and B is 810 kilometers. A car drives from A to B at a speed of 60 kilometers per hour. After driving for 13 hours, how many kilometers is there to B?
甲、乙两地相距810千米，一辆汽车以每小时60千米的速度从甲地开往乙地，行驶了13小时后，离乙地还有多少千米？
<gadget id="calculator">60 * 13</gadget>
<output>780</output>

<gadget id="calculator">810 - 780</gadget>
<output>30</output>

<result>30</result>