Compounds Containing Nitrogen

How many moles of iodomethane are consumed in the following conversion?

\(\mathrm{CH}_3 \mathrm{NH}_2 \xrightarrow[\Delta]{\mathrm{CH}_3 \mathrm{l}}\left(\mathrm{CH}_3\right)_4 \mathrm{~N}^{+} \mathrm{I}^{-}\)