20 actual cars $\displaystyle\div\usepackage{cmbright}\Huge\$ 2 cars per symbol $\displaystyle=\usepackage{cmbright}\Huge\$ 10 symbols

(or 10 symbols $\displaystyle\cdot{2}\usepackage{cmbright}\Huge\$ cars $\displaystyle=\usepackage{cmbright}\Huge\$ 20 actual cars)