Class 1 and Class 2 of the sixth grade have the same number of students. The boys in Class 1 are girls (2/3), and the boys in Class 2 are girls (4/5). The total number of boys in these two classes is the number of girls. (fill in the score)
六年级一班和二班人数相等，一班的男生是女生的(2/3)，二班男生是女生的(4/5)．这两个班男生总人数是女生的多少．(填分数)
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(2/5) + (4/9)</gadget>
<output>38/45 = around 0.844444</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">(3/5) + (5/9)</gadget>
<output>52/45 = around 1.155556</output>

<gadget id="calculator">(38/45) / (52/45)</gadget>
<output>19/26 = around 0.730769</output>

<result>19/26 = around 0.730769</result>