Guangming Primary School has a total of 1120 students. The ratio of boys to girls is 5:3. Later, some girls were transferred. At this time, the ratio of boys to girls is 5:4. How many girls are there now?
光明小学共有学生1120人，男生和女生人数的比是5：3，后来又转来女生若干人，这时男、女生人数的比是5：4．现在女生有多少人？
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</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">(5/8) / (5/9)</gadget>
<output>9/8 = around 1.125</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">1_120 * (9/8) * (4/9)</gadget>
<output>560</output>

<result>560</result>