The number of boys in a class accounts for (3/5). If the girls are transferred (1/3), then there are 20 more boys than girls. How many boys are there in the class?
一个班男生人数占(3/5)，如果女生调走(1/3)，则男生比女生还多20人，班级原有男生多少人？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/5) * (2/3)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(3/5) - (4/15)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / (1/3)</gadget>
<output>60</output>

<gadget id="calculator">60 * (3/5)</gadget>
<output>36</output>

<result>36</result>