How do you multiply and divide in base1?

Question

Base1 adds and subtracts but what about multiplying and dividing in base1?

Answer 1

Well, multiplication is not hard:

E.g. let's do $3_{10} \cdot 5_{10}$, i.e $111_1 \cdot 11111_1$:

\begin{array}{r} & 11111\\ & 111\\ \hline & 11111\\ & 11111\\ & 11111\\ \hline & 111111111111111\\ \end{array}

But division is what tore apart the Roman Empire.