There are 48 students in the chorus, including 18 boys. Later, how many boys joined the chorus. At this time, the number of boys was just 2/5 of the total number of the chorus. How many boys joined the chorus later?
合唱队有学生48人，其中男生18人，后来又有几名男生加入，这时男生人数正好是合唱队总人数的(2/5)，后来加入合唱队的男生有几名？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">48 * (2/5)</gadget>
<output>96/5 = around 19.2</output>

<gadget id="calculator">(96/5) - 18</gadget>
<output>6/5 = around 1.2</output>

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

<gadget id="calculator">(6/5) / (3/5)</gadget>
<output>2</output>

<result>2</result>