Units of plancks law in terms of wavelength

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The discussion centers on the units derived from Planck's law, specifically the expression after removing steradians, which is given as h c^2/λ^5. One participant calculates the units to be J*m/s, while another references Wikipedia's assertion that the correct units are J/(m³*s). The confusion arises from the interpretation of the wavelength term raised to the fifth power in the denominator. Clarification is sought on how to reconcile these differing unit interpretations. Understanding the dimensional analysis of Planck's law is crucial for accurate scientific communication.
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The dimensional term in Planck's law (after getting rid of steradians) is

\frac{h c^2}{\lambda^5}[\itex]Which seems to yield units of J*m/s. However, Wikipedia suggests that the units are J/(m<sup>3</sup>*s). If wikipedia is right, how do you get that answer?
 
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How did you get J*m/s? There is a length to the 5th power in the denominator.

(the closing tag is [/itex])
 

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