Problem: a train running at the speed of 162 km / hr crosses a pole in 9 seconds . find the length of the train .
Rationale: "speed = 162 * ( 5 / 18 ) m / sec = 45 m / sec length of train ( distance ) = speed * time ( 45 ) * 9 = 405 meter answer : d"
annotated_formula: multiply(divide(multiply(162, const_1000), const_3600), 9)