The school held a track and field meeting. There were 64 students in the third and fourth grades who signed up for it. The number of people who signed up for the first and second grades was only half of that of the third and fourth grades. The number of people who signed up for the fifth and sixth grades was 12 more than the total number of people who signed up for the first to fourth grades. How many people in the fifth and sixth grades sign up for the school sports meeting?
学校举行田径运动会，三、四年级有64人报名参加，一、二年级报名的人数只有三、四年级的一半，五、六年级报名的人数比一至四年级报名的总人数多12人．五、六年级有多少人报名参加学校运动会？
<gadget id="calculator">64 / 2</gadget>
<output>32</output>

<gadget id="calculator">32 + 64 + 12</gadget>
<output>108</output>

<result>108</result>