There are 42 people in the science and technology team, of which boys accounted for (3/7). Later, how many boys were added. At this time, boys accounted for the whole number (1/2). How many boys were added?
科技小组共有42人，其中男生占(3/7)，后来又增加了几名男生，这时男生占全部人数的(1/2)，增加了几名男生？
<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">42 - 18</gadget>
<output>24</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">24 / (1/2)</gadget>
<output>48</output>

<gadget id="calculator">48 - 42</gadget>
<output>6</output>

<result>6</result>