There are 40 boys, and the number of boys is the number of girls (4/5). How many people are there in this class? ?
男生有40人，男生的人数是女生的(4/5)，这个班一共有多少人？？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40 / (4/5)</gadget>
<output>50</output>

<gadget id="calculator">50 + 40</gadget>
<output>90</output>

<result>90</result>