There are 30 boys in Class 1, accounting for 2/3 of the whole class. How many people are there in the class?
六1班有男生30人，占全班人数的(2/3)，全班有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">30 / (2/3)</gadget>
<output>45</output>

<result>45</result>