place value
100

[3x100]+[7x10]+[4x1]

374

200

[6x1000]+[2x100]+[9x1]

6029

300

[4x100]+[9x1]+[8x0.01]

409.08

500
[7x10000]+[5x100]+[3x0.1]+[5x0.001]

70500.305