There are 50 students in a class of six years. When 1/3 of the boys and 5 girls leave, the remaining boys and girls are equal in number. So how many boys are there in this class?
六年一班有50人，当男生的(1/3)和5个女生离开后，剩下的男女生人数相等，那么这个班原来有多少男生？
<gadget id="calculator">50 - 5</gadget>
<output>45</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

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

<result>27</result>