WOLFRAM SYSTEM MODELER
    MRate_4Unrestricted multiplicative rate element with four influencing variables  | 
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SystemModel["SystemDynamics.Rates.MRate_4"]

| rate | 
         Type: Real  | 
    
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| u | 
         Type: RealInput Description: First signal inflow variable  | 
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|---|---|---|
| u1 | 
         Type: RealInput Description: Second signal inflow variable  | 
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| u2 | 
         Type: RealInput Description: Third signal inflow variable  | 
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| u3 | 
         Type: RealInput Description: Fourth signal inflow variable  | 
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| y | 
         Type: MassOutPort Description: Mass inflow variable  | 
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| y1 | 
         Type: MassOutPort Description: Mass outflow variable  | 
    
| prod_4_1 | 
         Type: Prod_4 Description: Product of four influencing factors  | 
    
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