The number of students in a class is between 40 and 50, and the ratio of the number of boys to the number of girls is 5:6. How many boys are there in this class?
某班学生数在40到50之间，男生人数和女生人数的比是5：6，这个班男生是多少人．
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">44 * (5/11)</gadget>
<output>20</output>

<result>20</result>