The number of boys in a certain class last semester accounted for the whole class (5/9). After this semester, 3 new boys and 3 girls were transferred, and the number of boys accounted for the whole class (11/20). How many boys are there in this class? ?
某班上学期男生人数占全班人数的(5/9)，本学期新转来男、女生各3人后，男生人数占全班人数的(11/20)，这个班现有男生多少人？
<gadget id="calculator">11 / 20</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">3 * (11/20)</gadget>
<output>33/20 = around 1.65</output>

<gadget id="calculator">(33/20) - 3</gadget>
<output>-27/20 = around -1.35</output>

<gadget id="calculator">(33/20) + (-27/20)</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(5/9) - (11/20)</gadget>
<output>1/180 = around 0.005556</output>

<gadget id="calculator">(3/10) / (1/180)</gadget>
<output>54</output>

<gadget id="calculator">54 + 6</gadget>
<output>60</output>

<gadget id="calculator">60 * (11/20)</gadget>
<output>33</output>

<result>33</result>