There are 55 students in Class 1 of June. Girls account for 2/5 of the whole class. How many boys are there?
六1班有55人，女生占全班人数的(2/5)，男生有多少人．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">55 * (2/5)</gadget>
<output>22</output>

<gadget id="calculator">55 - 22</gadget>
<output>33</output>

<result>33</result>