It's important to know the location of the parcel of land relative to the Zoning District, because it defines the minimum frontage, lot depth and net land area requirements for "buildable " lots. The Zoning District also defines the setback requirements and land use restrictions that may be applicable to the proposed lots. Once you have this information you will be able to estimate the maximum number of lots you can create.
Please note that the determining factors in the final design of the proposed division of land will be frontage and access. Their existence and/or absence will determine whether you will need to submit your proposal as a Form A (Not Requiring Approval Under the Subdivision Control Law) or as a Form C (Approval Required Under the Subdivision Control Law), which will have a bearing on the Planning Board's review process.