According to that calculator what kind of dc motor do I need now ?
A brushed DC motor, with torque and RPM that produce the required RMF and that runs on the appropriate voltage.
You have already filled in some values in the table Enter Motor Characteristics: 30 kg*m (a very large torque) at 416 RPM (pretty fast), which gave you RMF = 208, about 5 times higher than required.
Where did those values come from?