The number of students in Class 51 accounts for (1/16) of the whole school, and boys account for (2/5) of the class. What percentage of the whole school are boys?
五1班学生人数占全校人数的(1/16)，其中男生又占班中人数的(2/5)，男生占全校人数的几分之几？
<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 * (1/16) * (2/5)</gadget>
<output>1/40 = around 0.025</output>

<result>1/40 = around 0.025</result>