Abstract: A multi-operation computer instruction is executed to obtain an intermediate result. The execution includes selecting digits of a plurality of digits of multiple values to be multiplied. A location defined to hold a digit is greater in size than the size of the digit and further defined to hold a carry digit. The digits are selected from a predefined group of digits of a plurality of predefined groups based on a selection control of the instruction. The digits selected are multiplied to obtain a plurality of results. At least one result may be shifted a preselected amount to obtain at least one shifted result. One or more results and any shifted results, at least, are added to obtain an intermediate result. Execution of the instruction is repeated for multiple other predefined groups providing a plurality of intermediate results used to obtain a product of multiplying the multiple values.