A man-made satellite travels about 7.9 kilometers per second, and the speed of a man-made satellite is about two-thirds of that of a spaceship. How many kilometers does a spaceship travel per second?
人造卫星每秒大约运行7.9千米，人造卫星的运行速度约是宇宙飞船的三分之二，宇宙飞船每秒大约运行多少千米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">7.9 / (2/3)</gadget>
<output>11.85</output>

<result>11.85</result>