There are 200 students in the sixth grade of Guangming Primary School, and (2/5) of them are girls. How many are boys?
光明小学六年级有200人，其中(2/5)是女生，男生有多少人？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">200 * (3/5)</gadget>
<output>120</output>

<result>120</result>