  We give a description of the tensor product of SC-reciprocity presheaves with
transfers in terms of $K$-group of geometric type, and we study a structure of
the tensor product of $\mathbb{G}_a$ and $\mathbb{G}_a$. We apply our
description to give a description of Chow group of 0-cycles with modulus of
products of curves. We also show that the tensor product of $\mathbb{G}_a$ and
$\mathbb{G}_m$ is isomorphic to the sheaf $\Omega^1$ of K\"ahler differential
forms as reciprocity sheaves over characteristic zero.
