The teacher led 99 students to plant 100 trees. The teacher planted one tree first, and then said to the students: "Boys plant two trees each, and girls plant two trees together." After speaking, he distributed the 99 saplings to everyone , just divide the saplings according to the requirements, how many boys are there among the 99 students.
老师带99名同学种树100棵，老师先种一棵，然后对同学们说："男生每人种两棵，女生每两人合种一棵．"说完把99棵树苗分给了大家，正好按要求把树苗分完，则99名学生中男生为多少名．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">99 * (1/2)</gadget>
<output>99/2 = around 49.5</output>

<gadget id="calculator">99 - (99/2)</gadget>
<output>99/2 = around 49.5</output>

<gadget id="calculator">2 - (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(99/2) / (3/2)</gadget>
<output>33</output>

<result>33</result>