There are 300 students in the sixth grade, the number of girls (3/10) is the number of boys (1/5), how many boys are there in the sixth grade?
六年级共有学生300人，女生人数的(3/10)是男生人数的(1/5)，六年级男生有多少人？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">300 * (3/10)</gadget>
<output>90</output>

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

<gadget id="calculator">(3/10) + (1/5)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">90 / (1/2)</gadget>
<output>180</output>

<result>180</result>