Large number and three-digit arithmetic

Question

I want to use three-digit arithmetic to calculate $16.71 - 15920 \times 0.667$ Is it correct to do it in the following way?

\begin{align*} 16.71 - 15920 \times 0.667 &= 1.67 \times 10 - 1.06\times 10^4\\ &= 0.00167 \times 10^4 - 1.06\times 10^4 \\ &= -1.05 \times 10^4, \end{align*}

where $15920 \times 0.667 = 10618.64$.

Answer 1

I would write $$\frac{1671}{100}-15920\times \frac{667}{1000}=\frac{16710-15920\times 667}{1000}=-\frac{10601930}{1000}$$