The speed of a train is 180km/hour. The speed of a car is (5/9) that of the train and (1/9) that of a jet plane. What is the speed of this jet?
一列火车的速度是180km/时．一辆小汽车的速度是这列火车的(5/9)，是一架喷气式飞机的(1/9)．这架喷气式飞机的速度是多少？
<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>