There are 720 students in a certain elementary school, among which three good students account for (3/40), how many three good students are there?
某小学有学生720人，其中三好学生占(3/40)，三好学生有多少人？
<gadget id="calculator">3 / 40</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">720 * (3/40)</gadget>
<output>54</output>

<result>54</result>