The school organized 56 students to rehearse gymnastics, of which boys accounted for 3/8 of the total number, and later added several boys. At this time, the number of girls is less than the number of boys (1/6), how many boys have been added?
学校组织56名同学排练体操，其中男生人数占总人数的(3/8)，后来增加了几名男孩．这时，女生人数比男生人数少(1/6)，增加了几名男生？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">56 * (3/8)</gadget>
<output>21</output>

<gadget id="calculator">56 - 21</gadget>
<output>35</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">35 / (5/6)</gadget>
<output>42</output>

<gadget id="calculator">42 - 21</gadget>
<output>21</output>

<result>21</result>