There are 49 students in the first class of the sixth grade. At the sports meeting, the boys (1/5) and girls (1/4) of the class are selected to join the guard of honor, and the remaining 38 people are engaged in service work. How many male students are there in Class 1, Grade 6?
六年级一班有49名同学，运动会上选出全班男生的(1/5)和女生的(1/4)参加仪仗队，剩下的38人搞服务工作．六年级一班有多少名男同学．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 49</gadget>
<output>49/4 = around 12.25</output>

<gadget id="calculator">38 - 49</gadget>
<output>-11</output>

<gadget id="calculator">(49/4) + (-11)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(5/4) / (1/20)</gadget>
<output>25</output>

<result>25</result>