In 3 × 10000 + 7 × 1000 + 9 × 100 + 0 ×10 + 4

Place value of 3 = 3× 10000

= 30000

Place value of 7 = 7× 1000

= 7000

Place value of 9 = 9× 100

= 900

Place value of 0 = 0× 10

= 0

Place value of 4 = 4× 1

= 4

Adding all place values = 30000+7000+900+0+4

= 37904