The DSP48E1 slice: fit a x b and its running sum

Set two operand widths and a number of terms. See how many 25 x 18 slices the product takes and whether the 48-bit accumulator has room for the sum.

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Where the numbers come from

gHashTag/t27 specs/fpga/dsp/multipliers.t27 (t27#8985): every value on the page is its fn bodies, compiled to wasm (logic.js)
Xilinx UG479, 7 Series DSP48E1 Slice User Guide: a 25 x 18 two's complement multiplier and a 48-bit accumulator
Xilinx DS180, 7 Series FPGAs Data Sheet: Overview: 740 DSP48E1 slices on the XC7A200T