The distance between A and B is 840km. A car departs from A to B at 6:00 in the morning and travels 180km at 3:00. At this speed, when will the car reach B?
甲乙两地相距840km．一辆汽车早上6：00从甲地出发开往乙地，3时行了180km．照这样的速度，汽车什么时间能到达乙地？
<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<gadget id="calculator">840 / 60</gadget>
<output>14</output>

<gadget id="calculator">14 + 6</gadget>
<output>20</output>

<result>20</result>