my country's per capita arable land area is about 900 square meters, which is 2/5 of the world's average level. What is the average arable land area per capita in the world?
我国人均耕地面积约900平方米，是世界平均水平的(2/5)．世界人均耕地面积是多少？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">900 / (2/5)</gadget>
<output>2_250</output>

<result>2_250</result>