Pencil by W.A. Googe
for 16K ZX81
Popular Computing Weekly, 10-16 March 1983
==========================================

This program was inadvertantly omitted from Popular Computing Weekly, February 24 - March 2. It is a multiplication routine which can multiply two 14 digit numbers accurately, rather than rounding off the answer to the nearest eight digits.

The task was complicated because no functions such as VAL could be applied to numbers greater than eight figures, as they would be rounded off. The solution was to hold the relevant numbers in strings, together with simple variables set to the same length as the appropriate strings. This program, for a ZX81, can be RUN in FAST, but this will prevent you from seeing the computer arrive at the answer digit by digit.