in serial-serial fashion, i.e. both operands being entered serially (G06F7/533 takes precedence)

Full Title

Methods or arrangements for processing data by operating upon the order or content of the data handled (logic circuits H03K19/00) > Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation > using non-contact-making devices, e.g. tube, solid state device; using unspecified devices > Multiplying; Dividing (G06F7/483 - G06F7/491, G06F7/544 take precedence) > Multiplying only > in serial-serial fashion, i.e. both operands being entered serially (G06F7/533 takes precedence)