Suppose we already have Secure Two-party Production protocol as follows:

Prod2Sum: Xl * XZ = Zl + ZZ In the above equation, Xi is the private input and Zi is the private output, both belong to party i. Clearly show how we can use Prod2Sum protocol to generate the final private outputs for the parties in the following Secure Multiparty Production protocol. Xl * XZ * ... *Xn = + zz + +z