The ratio of the number of girls to the number of boys in Class 4 1 is 4:5. After transferring to 1 girl in this period, the ratio of the number of girls to the number of boys is 5:6. How many people are there in the class now?
四1班女生人数与男生人数的比是4：5，本期转入女生1人后，女生人数与男生人数的比是5：6，现在班上共有多少人？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(5/6) - (4/5)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / (1/30)</gadget>
<output>30</output>

<gadget id="calculator">30 * (5/6)</gadget>
<output>25</output>

<gadget id="calculator">25 + 30</gadget>
<output>55</output>

<result>55</result>