(3/4) of the sixth grade students of Hongxing Primary School participated in the winter long-distance running exercise. Except for 45 boys, girls accounted for 40% of the number of participants. How many people in the sixth grade?
红星小学六年级学生的(3/4)参加了冬季长跑锻炼，除去男生45人参加外，参加的女生占参加锻炼人数的40%，六年级共有多少人？
<gadget id="calculator">40 / 100</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">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">45 / (3/5) / (3/4)</gadget>
<output>100</output>

<result>100</result>