Longxin School has a total of 1,000 students, of which girls account for 2/5 of the total. How many boys are there? (answer in multiple ways)
龙新学校共有学生1000名，其中女生占总数的(2/5)，男生有多少人？(用多种方法解答)
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_000 * (2/5)</gadget>
<output>400</output>

<gadget id="calculator">1_000 - 400</gadget>
<output>600</output>

<result>600</result>