In the sixth grade, there are 28 fewer girls than 60% of the total number of the whole grade, and 9 more boys than 50% of the total number of the whole grade. How many people are there in the sixth grade?
六年级女生比全年级总人数的60%少28人，男生比全年级总人数的50%多9人．六年级一共多少人？
<gadget id="calculator">28 - 9</gadget>
<output>19</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) - 1</gadget>
<output>-1/2 = around -0.5</output>

<gadget id="calculator">(3/5) + (-1/2)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">19 / (1/10)</gadget>
<output>190</output>

<result>190</result>