1. **State the problem:** Ella wants to convert R$3390 Brazilian reais to Mexican pesos (Mex$). 2. **Identify the conversion rate:** R$1 = Mex$5.61. 3. **Write the conversion formula:** $$ \text{Amount in Mex$} = \text{Amount in R$} \times \text{Conversion rate} $$ 4. **Substitute the values:** $$ \text{Amount in Mex$} = 3390 \times 5.61 $$ 5. **Calculate:** $$ 3390 \times 5.61 = 19017.9 $$ 6. **Round to the nearest whole number:** $$ \approx 19018 $$ **Final answer:** Ella will have approximately Mex$19018.