Robuta

https://www.wolframalpha.com/input/?i=Quotient%5B%28+%281e18+%2F+2%29+%2B+x+*+%280.0025e18%29+%29%2C+1e18%5D+%3D+0+%2C+x+%3E+0 Quotient[( (1e18 / 2) + x * (0.0025e18) ), 1e18] = 0 , x 0 - Wolfram|Alpha quotient x wolfram alpha