In a math test, 30 students in the five-year class got excellent results, accounting for three-quarters of the class. How many students are there in the five-year class?
一次数学测验，五年一班有30人取得优秀，占全班人数四分之三，五年一班共有多少名学生？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">30 / (3/4)</gadget>
<output>40</output>

<result>40</result>