【20】The figure on the right is a deformed red cross, divided into six regions. Now we need to color it using four colors, with the requirement that two adjacent regions (two regions with a common border are called adjacent) must be colored differently. If colors can be reused, then there are ( ) different coloring methods.
【Key Points】Step-by-step counting principle: Coloring problems.
【Analysis】Step 1: First color the D area, with 4 colors to choose from;
Step 2: Color the A area, with 3 colors to choose from;
Step 3: Color the B area, with 2 colors to choose from;
Step 4: Color the C area, with 2 colors to choose from;
Step 5: Color the E area, with 3 colors to choose from;
Step 6: Color the F area, with 3 colors to choose from;
According to the step-by-step counting principle, there are: $4 \times 3 \times 2 \times 2 \times 3 \times 3=432$ different coloring methods.

【Answer】 432