There are 9 people in the English interest group in the sixth grade class, which is 1/5 of the whole class. How many people are there in the sixth grade class? (solution with equation)
六年级一班参加英语兴趣小组有9人，是全班人数的(1/5)，六年级一班有多少人？(用方程解答)
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">9 / (1/5)</gadget>
<output>45</output>

<result>45</result>