find the smallest number that must be added to 1780 to make it a perfect square .
"4 1780 ( 42 16 82 180 164 16 number to be added = ( 43 ) 2 - 1780 = 1849 - 1780 = 69 . answer c"
multiply(divide(divide(divide(divide(1780, const_1000), const_3), const_3), const_3), divide(divide(divide(divide(1780, const_1000), const_3), const_3), const_3))