The students in class 6 and 1 waiting to receive the living allowance for poor students lined up neatly in a row at the school's general affairs office, and Qiangqiang also stood in the line. He counted and found that the number of people in front of him was 3/4 of the total number, and the number of people behind him was 1/5 of the total number. What is the number of strong players from the front to the back?
六1班等候领取贫困生生活补助款的同学在学校总务处整齐地排成一列，强强也站在队里．他数了数，发现排在他前面的人数是总人数的(3/4)，排在他后面的人数是总人数的(1/5)．从前往后数强强排在第几位？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (3/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

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

<gadget id="calculator">20 * (3/4)</gadget>
<output>15</output>

<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<result>16</result>