In a certain class, the number of people participating in the science and technology group accounts for 25% of the whole class, and the number of people participating in the art group accounts for 37.5% of the whole class. The number of people participating in the art group is 7 more than the number of people participating in the technology group. How many students are there in total in this class?
某班参加科技小组的人数占全班人数的25%，参加美术小组的人数占全班人数的37.5%，参加美术小组的人数比参加科技小组的人数多7人．该班共有学生多少人？
<gadget id="calculator">37.5 / 100</gadget>
<output>0.375</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">0.375 - (1/4)</gadget>
<output>0.125</output>

<gadget id="calculator">7 / 0.125</gadget>
<output>56</output>

<result>56</result>