There are 56 students in class 31, among which girls account for 3/7 of the whole class. How many boys are there?
三1班有56名学生，其中女生占全班人数的(3/7)，男生有多少名？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">56 * (4/7)</gadget>
<output>32</output>

<result>32</result>