The area of Oceania is about 900 square kilometers, which is (9/10) the area of Europe, and the area of North America is (12/5) the area of Europe. What is the area of North America in square kilometers?
大洋洲面积约是900平方千米，是欧洲面积的(9/10)，北美洲面积又是欧洲面积的(12/5)．北美洲的面积是多少平方千米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">900 / (9/10)</gadget>
<output>1_000</output>

<gadget id="calculator">12 / 5</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">1_000 * (12/5)</gadget>
<output>2_400</output>

<result>2_400</result>