There are 90 girls in the sixth grade, and the number of boys is 10% more than that of girls. How many boys are in the sixth grade?
六年级女生90人，男生人数比女生多10%，六年级男生多少人．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">90 * (11/10)</gadget>
<output>99</output>

<result>99</result>