In the speech event of "Creating an Integrity Campus" held by the school, there were 20 girls who participated in the speech, 20% less than the boys who participated in the speech. How many boys participated in the speech?
在学校举办的"创诚信校园"的演讲活动中，参加演讲的女生有20人，比参加演讲的男生少20%．参加演讲的男生有多少人？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">20 / (4/5)</gadget>
<output>25</output>

<result>25</result>