If a steel pipe with a length of 4.5 meters is cut into two specifications of 3 decimeters and 4 decimeters, and the cut is just completed, how many different cutting methods can there be?
将一根长4.5米的钢管截成3分米和4分米两种规格，并且恰好截完，可以有多少种不同的截法？
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