A leg calculation excluding reserve

A fictional navigation worksheet gives a helicopter a 90 nautical-mile leg, a constant groundspeed of 60 knots and a fuel-consumption rate of 16 gallons per hour. It explicitly asks for leg time and trip fuel only, excluding reserve, taxi and all other planning allowances. A learner multiplies 16 by 90 and reports a very large fuel value without converting the time. Another computes the leg correctly but calls that trip amount the complete dispatch requirement. The task asks for the two calculations and the limit of the conclusion. No aircraft usable-fuel capacity, actual weather change, alternate requirement or operational authorization is supplied. A complete answer retains nautical miles, hours and gallons and distinguishes an arithmetic input from a complete safe and lawful fuel plan.