[Sad news] Wai, I do not know the math of elementary school students

[Sad news] Wai, I do not know the math of elementary school students 1 : 2019/08/23 (Friday) 09: 39: 59.676 ID: lyS0drZ8r.net How do you get this area out? The problem of elementary schoolchildren   http://s.imgur.com/min/embed.js Related article document.write(” + ”);

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