There are 45 people in Class 51. Some (5/9) students have subscribed to "Mathematics Newspaper", and some (3/5) students have subscribed to "Chinese Newspaper". How many people have subscribed to both newspapers?
五1班有45人，有(5/9)的学生订了《数学报》，有(3/5)的学生订了《语文报》，两种报纸都订的有多少人？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">45 * (5/9)</gadget>
<output>25</output>

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

<gadget id="calculator">45 * (3/5)</gadget>
<output>27</output>

<gadget id="calculator">25 + 27</gadget>
<output>52</output>

<gadget id="calculator">52 - 45</gadget>
<output>7</output>

<result>7</result>