There were 70 original students in the second class of the sixth grade, of which boys accounted for (4/7). Later, some girls were transferred, and the ratio of boys to girls was 5:4. How many people are there in the class now?
六年二班原有学生70人，其中男生占(4/7)．后来转来女生若干人，这时男生与女生人数的比是5：4．现在全班有多少人？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(4/7) / (5/9)</gadget>
<output>36/35 = around 1.028571</output>

<gadget id="calculator">70 * (36/35)</gadget>
<output>72</output>

<result>72</result>