Which of the following is the most efficient way to estimate 19%19\%19% of \402$?
0.19×4020.19 \times 4020.19×402
0.20×4000.20 \times 4000.20×400
0.10×4000.10 \times 4000.10×400
0.19×5000.19 \times 5000.19×500