The number of boys in the sixth grade is the number of girls (4/11), so how much is the number of boys in the whole grade?
六年级的男生人数是女生人数的(4/11)，那么男生人数占全年级人数的多少．
<gadget id="calculator">4 / 11</gadget>
<output>4/11 = around 0.363636</output>

<gadget id="calculator">1 + (4/11)</gadget>
<output>15/11 = around 1.363636</output>

<gadget id="calculator">(4/11) / (15/11)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>