The number of girls in a certain class is male (3/4), and later transferred to 3 girls. At this time, the ratio of the number of boys to the number of girls is 5:4. How many people are there in the class?
某班女生人数是男生的(3/4)，后来转进3名女生，这时男生人数与女生人数的比是5：4，原来全班有多少人？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(4/5) - (3/4)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">3 / (1/20)</gadget>
<output>60</output>

<gadget id="calculator">60 * (3/4)</gadget>
<output>45</output>

<gadget id="calculator">60 + 45</gadget>
<output>105</output>

<result>105</result>