The road roller presses a long (9/5) kilometer canal, and 3 road rollers (1/6) complete the work in an hour. On average, how many kilometers does each road roller dig per hour?
压路机压一条长(9/5)千米的水渠，3台压路机(1/6)小时压完，平均每台压路机每小时挖多少千米？
<gadget id="calculator">9 / 5</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(9/5) / (1/6) / 3</gadget>
<output>18/5 = around 3.6</output>

<result>18/5 = around 3.6</result>