There are 42 students in the fifth class of the sixth grade, and the number of boys (1/3) is equal to the number of girls (1/4), so how many fewer boys are there than girls?
六年级五班共有学生42人，其中男生人数的(1/3)与女生人数的(1/4)相等，则男生比女生少多少人．
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">42 * (4/7)</gadget>
<output>24</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">42 * (3/7)</gadget>
<output>18</output>

<gadget id="calculator">24 - 18</gadget>
<output>6</output>

<result>6</result>