viewimage.php?id=2fa8c3&no=29bcc427b38577a16fb3dab004c86b6fb8c469a51a466a5581033dea644393f585e63d68e357a58b4d7549659be07e90b370fb226c29e1df7b6ebaec11755a3d3d738be5f0e52caa

7 : 4 = 12 : ?



그리고

4 빼기 7 이 뭐냐?