Problem: a train running at the speed of 60 km / hr crosses a pole in 30 seconds . what is the length of the train ?
Rationale: "speed = ( 60 * 5 / 18 ) m / sec = ( 50 / 3 ) m / sec length of the train = ( speed x time ) = ( 50 / 3 * 30 ) m = 500 m . answer : a"
annotated_formula: multiply(divide(multiply(60, const_1000), const_3600), 30)