There are 6,000,000,000 people in the whole world, and only (2/5) people have sufficient fresh water guarantee, how many millions of people have sufficient fresh water guarantee in the whole world?
全世界有60亿人，只有(2/5)的人有充足的淡水保障，全世界有充足淡水保障的人有多少亿？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 * (2/5)</gadget>
<output>24</output>

<result>24</result>