The Dormand–Prince method has seven stages, but it uses only six function evaluations per step because it has the "First Same As Last" (FSAL) property: the last stage is evaluated at the same point as the first stage of the next step.
The Dormand–Prince method has seven stages, but it employs only six function evaluations per step due to its "First Same As Last" (FSAL) characteristic: the final stage is evaluated at the same point as the initial stage of the subsequent step.