いつもπ調べようとしたらこれ出てくるhttps://www.google.co.jp/search?q=%E3%81%B1%E3%81%84&safe=active&sca_esv=ccb8066356fd07b7&udm=2&ei=noRaaN7OCbmVvr0Ppv7lsA8&ved=0ahUKEwjeldmQ84mOAxW5iq8BHSZ_GfYQ4dUDCBE&uact=5&oq=%E3%81%B1%E3%81%84&gs_lp=EgNpbWciBuOBseOBhDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIKEAAYgAQYsQMYBDIHEAAYgAQYBEiCG1C-BVj-FXACeACQAQCYAZIBoAHyA6oBAzEuM7gBA8gBAPgBAZgCBaACoASoAgDCAggQABiABBixA8ICBRAAGIAEwgILEAAYgAQYsQMYgwHCAg0QABiABBixAxiDARgEmAMBiAYBkgcDMi4zoAf7DLIHAzEuM7gHkwTCBwUyLTIuM8gHKA&sclient=img
