There are 240 students in the sixth grade, 40% of whom are boys. Later, a new group of boys was recruited. At this time, boys accounted for 50%. How many boys were recruited?
六年级共240人，男生占40%，后来又新招一批男生，这时男生占50%，新招多少男生？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">240 * (3/5)</gadget>
<output>144</output>

<gadget id="calculator">50 / 100</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">144 / (1/2)</gadget>
<output>288</output>

<gadget id="calculator">288 - 240</gadget>
<output>48</output>

<result>48</result>