The speed of a train is 180 km/h, and the speed of a car is (5/9) of the speed of the train and (1/9) of the speed of an airplane. What is the speed of the airplane? km/h.
一列火车的速度是180千米/时，一辆小汽车的速度是这列火车速度的(5/9)，是一架飞机的速度的(1/9)，则这架飞机的速度为多少千米/时．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(5/9) / (1/9)</gadget>
<output>5</output>

<gadget id="calculator">180 * 5</gadget>
<output>900</output>

<result>900</result>