A car is driving from Nanjing to Shanghai, the whole journey is 450 kilometers, and the whole journey (2/3) has been done, how many kilometers is this car from Nanjing at this time?
一辆车从南京开往上海，全程是450千米，已经行了全程的(2/3)，这时这辆车距南京有多少千米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">450 * (2/3)</gadget>
<output>300</output>

<result>300</result>