66509+141400:(39839-39739)+1985.
=65509+141400/(100)+1985=65509+1414+1987=68910
66509 + 141400 / (39839 -39739) + 1985 39839 - 39739 = 100 141400 / 100 = 1414 66509 + 1414 + 1985 = 69908