car drives from place A to place B for the whole journey (2/7). At this time, there are still 45 kilometers away from the end point. How many kilometers is the road from place A to place B?
一辆汽车从甲地开往乙地，行了全程的(2/7)，这时离终点还有45千米，甲地到乙地的公路长多少千米？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">45 / (5/7)</gadget>
<output>63</output>

<result>63</result>