The fifth grade students are going to visit the Science and Technology Museum. The number of students is between 40 and 80. If they are divided into groups of 4, 6 or 9, they are all divided exactly. How many students in the fifth grade class are going to visit the Science and Technology Museum? people?
五年级同学去参观科技馆，人数在40至80之间，如果分成4人一组，6人一组或9人一组，都恰好分完，五年级一班去参观科技馆的学生有多少人？
<gadget id="calculator">2 * 2 * 3 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>